It's always been generally positive...the only real deviation being that the parents would have preferred I had went into a more traditional branch of art. I think they always assumed I'd out grow "comics".
My parents were and still are very supportive of my creative work, especially my dad. He even helped me get some commissioners. xD
My mother never directly told me not to write, but she dropped enough comments that I felt that what I was doing was wrong, and as I got older it was reaffirmed with such comments as "Writing isn't a real jobr." or "books are just a hobby." "Are you doing that writing thing again?" "You write such weird things. I never understand it."
It's the reason why I gave up writing for so long. Today, she seems supportive, if only that she hasn't openly bashed it but I don't expect much beyond that. My father has always been supportive of everything that I do but growing up in the a single home with my mom had a pretty big impact on me as a kid and growing up.
The majority of my family was always the type to just oooo and ahhhh over my art all throughout my childhood, just praising me for how good my drawings were and saying things like "wow none of our immediate family can do anything with art, where did this talent come from??"
The one exception being my mom. I've told this story before, but I'll tell it again xD Like the rest of my family she's always been supportive of my art, but she's the one person who would actually take the time to look at my drawings objectively and give criticisms here and there. These were especially helpful in middle school when I was first starting to take art "seriously", but was still pretty bad at a lot of things xD She'd point out all of the weird anatomy mistakes and encourage me to fix them in the future. One that stands out in my memory is I used to draw everyone with like... rounded square shoulders, and she'd always be like "why are all these people football players?" looool. Also like... I used to draw everyone wayyyyy too thin, like all malnourished, and she'd point things like that out too xD random stuff like that no one else ever bothered to point out. Those types of comments helped me lead my personal studies in specific directions, and over time I started correcting a lot of the basic mistakes.
Nowadays as an adult, she still likes to nitpick my drawings somewhat, but a lot of the things are like... stylistic choices that I may or may not change xD one recent comment on one page of my comic was "why is his mouth so square?" when I had a char making this expression 
it's like... if that's the worst thing you can point out, I'm clearly doing better >;D
Growing up, mostly they would go "Oh, that's nice" whenever I'd show them something. They never overly praised me to not inflate my ego, they never dragged my work down to dampen my self-esteem either.
It wasn't until high school that I got more solid feedback. I wrote and drew a comedic slice-of-life series in spiral-bound notebooks and once I finished a few 'episodes' I would make my dad read the update. I'd know if they were good if I heard him laugh.
Then my parents were pretty supportive when I decided to switch from pre-pharmacy to graphic design in college. Their ultimate goal has always been for me to be happy with what I do. 
I am blessed.
I grew up in a household that embraced the arts, though it was mostly on the musical side. My father writes music and plays several instruments, and my aunt used to sing opera and symphonies. So me drawing wasn't really a surprise.
I really am happy my family did love my art and embraced that as a part of me. My aunt would often save each drawing I made, and my father always asks about the stories I make. 
Though, as a career, I think I personally made the decision to not pursue art/comic-creating. There wasn't any discourage from my family to take up anything else, and I definitely wasn't told to stop drawing. I think the career talk was something I brought up to my aunt myself because I was still young and worried about what I wanted to do. I really wanted to be an electrical engineer, but I also really loved drawing. I think she was the one to help me see that I could have both, even if it wasn't both within my career, per se. 
I come from a relatively artistic family on both sides, so my creativity has always been encouraged. I really appreciate that my mom in particular was both encouraging of my work, while also teaching me how to get better. Now that I'm older I have the wonderful experience of being able to both go to my mom for advice, and have her come to me for advice and input. I love helping her on creative projects, and its always an ego boost when she listens to my opinion because she is very talented.
So yeah, supportive parents and supportive older sister.
The main thing is that I used to share my writing with my mom, but as I got older I stopped doing that. She is not at all happy I won't let her read my comic. XD
Edit: Thought it worth adding that I really lucked out as far as supportive teachers too, from kindergarten all the way to actual art teachers. And not because I was exceptional or anything, they were just good teachers that cared about what made me happy. It's not just about your talent, but about the people who influence your life caring about you as a developing person.
My parents are the religious type and uhhh, I don't think I'd be able to show much without them trying to give me a whole lecture about what I'm doing or about how it reflects on my spirituality. As a little kid, they encouraged me to be creative and yeah. I did just that, I had an active imagination playing with toys and I was always wanting to make up stories and stuff. I picked up music as a teen and started making music. I've shared songs I've made and story ideas before, and those were met with very indifferent views and at worst, this talk of "I don't want you making this kind of thing anymore."
Considering how I've always been the creative type and how I was essentially a high school dropout at the time, this kinda stuff destroyed me. I never felt like I was ever gonna make them proud or even close to happy, and these creations were my one chance to make 'em believe in me.. like.. I just felt like I'd always be a failure in life. I thought the best thing I could do was just give up on what I wanna pursue, get a regular job, and waste my life away feeling like that forever, and if it gets that bad, just kill myself if I can't take it anymore. I still strongly feel like that to this day, tbh
It's not until I started showing my friends instead that they were like, "dude, keep doing this, I wanna see what kinda stuff you can make" And yeah, they definitely gave me that push to just keep making things despite feeling like my parents would never want to understand what I'm trying to do. It wasn't until I was older that I realized that they just wanted to protect me from straying from religion and having high expectations and all that.. but I'd be lying if I said that I agreed with how they went about it. It never felt like they cared about my safety so much as they didn't want me to be to be me at all.
It sucks to hear dissent from the people you love most, and it can definitely be damaging to some extent. Like you find something you feel like you're good at, something that empowers you.. and they'd prefer you avoid that instead. It can feel like a real disconnect and almost a lack of consideration on their part.. but if you love what you're doing, you just gotta keep going. Parents like that just happen to not be in the audience that wants to see what you'll make. This doesn't make them horrible people, it just means they have different interests. If it happens, try not to take it so personally. (Not like I'm the best example of what I said, but still)
There will always be someone out there willing to enjoy the things you've made~
When I was really young, I started drawing because my sister was doing it and it looked fun. Eventually I started getting better, drawing more and more. The minute I started showing a little tiny spec of talent, the expectations of the people around me grew. Everyone knew I was an artist, but a lot of them had never seen my art. So they'd ask me to do things I wasn't capable of, like drawing photorealstic portraits, caricatures, oil paintings... They didn't realize that I was just a kid drawing dumb anime comics in spiral notebooks for fun.
As I got older, and my skills and interests branched out and became more varied, art was the sole trait for which I was recognized by most people. If you have an art project at school, you want that kid on your team. It was technically a compliment, but being known for one thing only gets tiring pretty fast. Especially because I knew I wasn't actually as talented as everyone said I was.
I wouldn't say I had an entirely negative experience with art as a child, but I learned to keep it to myself for the most part. I just wanted to have fun without expectations or turning art into study. I made art in my own time and with my friends, and for a long time I didn't focus on improving or making anything "impressive." I skated by on the fact that everyone already thought I was talented. It wasn't until college that I started studying art seriously. I do wish I'd started sooner, but oh well.
My mom didn't care for anything creative I produced as a child and as I got older it switched from indifference to negativity. My mom is one of those people that thinks your dreams are fucking stupid and you should just figure out the best paying job you can do and go to college for it.
I essentially think the same way now.
Weeeell. It is very mixed. When I was a child (under 10), my dad would be very supportive of me drawing.He encouraged me and praised me. I made my first "portrait", when I was very young (drawing my guinea pig with pencils). It looked really decent for my age. I remember the situation very well. I was laying on the floor, drawing my guinea pig, feeling super proud... My dad would praise me again and then... proceeded to add more fluff to the fur, drawing over my picture. Gosh, I was around 9 and still felt super awkward about someone correcting my drawing xD
My grandma was also super supportive, hanging up my pictures and all that. Some of my old drawings are still hanging on her wall (including my guinea pig ^^). When I would get more serious as a teen she also asked me to draw specific portraits.
Around age ten a lot of shit went down in my family, including the divorce of my parents. I stopped drawing for a while as I had enough other things on my mind. When I got back into it and started drawing portraits my family didn't care any more. I was living with my mom who was not supportive at all. She wouldn't actively discourage me, but it seemed like she didn't care at all, which really hurt. I don't think it was intentional, our life was very rough at the time and there were other things on her mind. But I still felt the impact. Luckily I had to much fun drawing and to man other people that encouraged me to stop and now I'm here =)
Growing with strict moral guardian parents, your creativity is most of the time watched and limited.
If I draw some negative topic such as gore (as any normal edgy teen did), demons, a girl with "slutty" clothes, swear words, scene of smoking/drinking, and anything perceived negative; I'd get a long lecture, my drawing or writing ripped, not allowed to do it again, and the impression I'm a fucking weirdo with messed up mind. Did I mention they always force me to show it when they see me drawing/writing?
That is why I always do both drawing and writing away from them or at night when they sleep. Whether it's a "safe" work I feel unsafe because of them. This habit still picks up unconsciously till now, even when Iy alone I always watch the door for "imaginary" them barging in and ask what am I drawing.
Even now I more likely to draw digitally on my phone because it's more private.
My family was, is, and always has been overwhelmingly supportive of my creative pursuits, whether it was kindergarten or college. The encouragement not only aided me in sticking with creative projects but instilled a discipline that bled over into other aspects of life
So hats off to you, my parents (who won't read this but they do read the comic)
As for my siblings....meh, you guys are alright
When i was a child my family was extremely supportive and encouraging. My brothers and cousins became my first fans. They enjoyed the comics and games i made. I had to read to them because i had a terrible calligraphy, but i think that helped us bond over my art.
They are still extremely supportive and are proud that i am sharing a comic online. 
When i was a child, my father didn't like that i was drawing so much, and he would repeat over and over that only manual / productive work pays money and every artist just end up in the streets begging for money. My mother didn't think much about me drawing, neither of them would look at what i draw, they pretty much never cared about it.
When i asked for going to an art school my father was opposed to it and despite my health issues, i failed the third year at high school just once and he sent me to the mecanic apprentice school / formation and i spent two years learning and working as a mechanic around the age of 15, but i was still drawing in my free time. Even tho i had back pain issue (spina bifida) he would need me to help him in the garage after work or school until very late sometimes, my father was only seeing life through work and nothing else, mecanic / repairing car was his passion. I would just help him sitting around because i couldn't whitstand a standing up pose for more than two hours.
My parents were fighting a lot after they divorced when i was 4 year old, fights for keeping me and my sister under their guard / home, and a lot of in between familly fight ensued, "tell your father i said this, tell your mother i said that, your mother's cousin said that etc etc" parents were not the most responsible to take care of their childs but had a lot of energy to fight to have the charge of the childrens as if it was a medal of pride. As a mean for escapism from how horrible the familly situation was, and how little care me and my sister really received i kept drawing and creating my characters and universe, at school it was not going very good either, from my elementary school and age of 5 / 6 i was allways at the last place of the classroom, and no other child wanted to get close for i was a little bit strange already, i was very quiet because there were already enough tensions, disputes, and problems at the house.
I remember that i was really bored at school and cursus were so easy i wasn't paying attention and just kept drawing in the margin of my books / lesson pages, and even in my class report journal, sometimes i would do stupid and idiotic strips on the side of my exam sheets and hopefully the professor was just laughing at them, but sometimes, one would not be amused and remove a point for the drawings all around lol.
Even after all these years, my father has 2 cancers these past two years, and this time, he has one in his bones... I can't say my father wasn't right about the fact i would never make a living by drawing, i feel like he has allways been disappointed by the fact i was born with a defect, and he will probably die without being able to prove him i'm worth something, or otherwise.
Well that's how it is.
My parents have been somewhat supportive. They paid for me to go to art classes, paid for me to go to art college... but they've never really given me any praise or the like. I don't think they really think positively or negatively of it.
But I was able to get a job as a graphics artist so I think they are happy with that at least.
I don't think they've ever read any of my comics. I kind of wish they would because I feel like my comics are a part of myself, but it'd also be a bit embarrassing.
For me they were very supportive , they even helped me to take a very cheap drawing class for one year. Even tho i appreciated the support i understood that they didnt see it as a main option for my future, like i know that even if they say words like "your good at drawing", "i like how you draw" or those type of stuff that they dont really think of it as something that can be considered "work". It kinda hurts knowing that but im gratefull that they didnt try to cut it out from my life and they even tried to understand me.
I'm lucky since my mom is pretty passionate about stories too - she's never outright told me that I should become a comic artist, but she's always been there - she numbered and spell-checked the comic books I made when I was in 4th grade, and gives me suggestions for my current comic. Like actual good suggestions. "maybe the story would be more dramatic if this happened..." and my brother reads my comic too 
although he still insists on calling my MC "Parises"
It was positive, but then again almost EVERYONE in my family could draw; I was just the only person who continued to draw in my adult years and kept my interest in it. My jaw dropped when I found out my mom could draw- she drew a woman in a bikini suit that was totally awesome! My mom never discouraged me to stop, but she never exactly encouraged me to chase my dreams- the only reason I got to where I am is because I willed it. I fell short in some areas, but did okay in others...