I like writing characters who are a little dumb and obnoxious. Everyone finds them annoying or problematic. But they have enough drive and confidence to do what they want and they don't give a damn what other people think.
I also like writing creepy characters. They act all weird and mysterious and they are totes hiding something. I usually make them very cold and they are usually much smarter than the MC and have a huge chip on their shoulder.
@emkay Vulcans are canonically some of the most volatile people in the setting. They had terrible, terrible wars until they decided to focus their culture on logic and emotional suppression. The Romulans, their close cousins, should give you an idea of what uninhibited Vulcans would be like. When a Vulcan snaps, it is spectacular.1
I like to write about heroes who don't take things too seriously and villains who are very self-aware.
My favourite type of character to write is what I would be if I didn't have social anxiety. Witty, swears a lot, over dramtic, sometimes sassy and often finds the answer either by being book smart or by accident. Take Sam Tracer one of my characters for example:
""PLATFORM 9 3/4 HOW THE F*CK AM I MEANT TO GET THERE! AM I SUPPOSED TO WALK INTO A PILLAR OR SOMETHING?!" I walk over to the pillar about to dramatically slide down it in defeat when I fall straight through.
"WHAT THE F*CK! I JUST-WHAT THE HE- oh I found platform 9 3/4." I look up and everyone with i 10 metres was starting at me. Great.
"Uh hey guys..." They all look at me disapprovingly.
"I meant to do that." I slowly get up and grab my trunk.
"What I did?" More disapproving looks. Oh well. Looking around I see the whole platform is full of families all here to farewell their kids... I suppose I should be grateful that I still have a family even if they aren't here. "
I like to write about normal people as in people who would react like most people would in a given situation - then push them to see how this can change. They might have a slight temper or be a bit immature but generally they don't have one, ruling personality trait. They're like an every man. They do their best but occasionally they make mistakes.
I think this is because I think most people aren't very different and I'm a bit sick and tired of the messiah narrative in a lot of modern literature, film and comics. As much as I love Harry Potter, LOTR, GOT and the like, it doesn't give you good characterization.
I think most people are tired of these, just look at Man of steel =/, I ain't against a messiah but I would like them to be people first and then they become gods
I'm the opposite of this, I sometimes love just imagining a character that's a complete psychopath or is a terrible human to the core and delve into what could make a person become such a villain,be it physiological or fiscal, granted sometimes I do also think some are a bit to crazy for my own good, mostly with the pure psychopathic, but it's always entertaining to see what fucked up thing my brain or characters will come up with =P
just gonna leave this here for your enjoyment 
I like writing characters that are based loosely off of aspects of my own personality, just so I can relate and know where to direct them--except make them exaggerated, this way they can sort've come into their own.
I've written shy underdogs who become more bold and more powerful as the story goes on, and I've written crazy/demented characters who only become more corrupt.
But recently, I really like making personalities that seem very basic but actually have a lot of depth with many layers. For example, Saedie from my webcomic Between the Realms1, comes off blunt, short-tempered, and crass. However, I've been exploring more of her softer side due to recent events in the series, so she's showing more vulnerability such as concern and compassion. There'll be more layers to her personality more, especially as she grows as a person. I like taking a basic 2D personality and turning it on it's head to make them seem more fleshed out and relate-able, and this actually makes them easier to write/draw
I still enjoy making villains or narcissists, it's just I haven't found my groove with these yet so they come off flawed and sometimes not as rounded as they need to be.
Out of all the characters I've written / role played, I have to say the meaner / Damaged ones are the most fun to write!
When I first started out writing I think I mostly was just trying to make characters that were as different from me as possible. I would give them traits that I wish I had, for example Rai Kang is really smart and speaks in 4 languages and enjoys math. I hate math and at the time I had just given up learning Mandarin and was trying to learn Japanese. I'm also introverted, but most of my characters tended to be extroverted, but I might have them share one of my hobbies, but their reasons for enjoying it be very different.
Looking at all of my different projects, there's always a really fun loving happy character to be found. Some times they are a supporting character, other times they are the lead. Some are meant to be annoying, others meant to be lovable. Their intelligence level ranges from smart, average, to kinda dumb. Some are really parody level crazy, some are silly but still grounded to reality. But these characters are imaginative, leap in before looking, have an optimistic look on life, and because they are so happy they are the most fun to write scenes for. But I've also noticed recently that these are my characters that are also hiding the most pain, or going through a rough time.
Now that I've noticed this in my writing I don't know if this kind of character will continue to make appearances in future stories or not.
The twisted ones Mainly for the fact that because they can be cynical, devious, manipulative and other sorts of things. I also really enjoy writing strong characters who pretend to be all that but are really just hot air.
I enjoy depicting aggressive personality types if only because they have the easiest traits to bring out 
My top three are;
It's the extremely introverted and antisocial person that I enjoy writing the most. Aside from those characteristics being 2 of the first things people will say about me, I enjoy writing how they try to rebel against society and keep their stuff under control. Like my characters in here1.
I really enjoy writing very calculating characters, who suffer from internal struggles partially from said calculatedness. It's fun when characters contradict themselves in some way, be it in ideologies, actions, personalities etc. It makes me want to develop them even more and see how they (don't) solve their problems.
Pic related - Project SHaDe, my next webcomic.
I enjoy really sarcastic characters who don't pull their punches. The less consideration they have for others feelings, the more freedom I get with making their dialogue as rude as possible. Preferably, they're also proactive, but not reckless. Maybe they don't care about burning bridges, but they care about risking their lives.
That, or really innocent, naive characters who through some contrived plot have high kill counts.
I prefer to make characters based on my real life experience and not follow the stereotypes but i really love the super smart ones who anzlyzing everything , they come up with plans , they are always calm no matter the situation etc.
I think they do try sometimes but they only use one of three personalities: the reluctant hero, the do-gooder or the maverick. And then they make them really like something random like marshmallows with hot chocolate or stamp collecting. And throw in a flashback or two.
@joannekwan I personally love that as a reader, when something happens that finally cracks their composure. It's an oddly goosebump-inducing feeling.
@IdiotWithPencil Truuue, any character that has 0 problems or obstacles to overcome isn't that interesting to me. Actually, that's what I love about Saitama from One Punch Man -- he has no obstacles when it comes to fighting, but that gives him other problems (mainly depression).
@Chrono Cool! Good luck finding an artist. Do you have any social media to follow you on? I'd like to stay updated when your story comes out.
@Wolven_Sister I enjoy that as both a reader and writer, seeing characters go from 2D to 3D. And same here with the relatable aspect, though sometimes I feel like I project too strongly on my characters. I try to think of it as giving them bits and pieces of myself, like Character A gets the sarcasm, Character B is analytical, etc.
Since I haven't really established a portfolio yet, I currently don't have any means of social media 
I've always avoided using apps like Twitter and Instagram—maybe it's about time I made them.
This would likely come with the creation of my first Webcomics. I'll be sure to give you the links when I have em :3
My favorite type to of personalities are those where the character has a clear devolution from who they start off from. I like to do this because often times, characters always grow into their persona, and I wanted to create something counteracting that notion. I wanted my character to be seen as corruptible rather than someone who always has iron will, for I think this is much more relatable than the latter
