This is something of a multi-faceted question, so for a break down-
Drawing in general:
Simply because it's fun and a long-time hobby of mine. Been drawing since I was a young child and just never stopped lol. I think the big decided/turning point for me though was early middle school, around 6th or 7th grade. I distinctly remember it being around then that I took a step back to look at my drawing and firmly deciding that it was something that I was really interested in and wanted to invest time and effort into getting better at as a Hobby with a capitol H (as opposed to other activities I did like Soccer/Baseball, or my feeble attempts at learning guitar lol). I agree with what others have said in that being able to see the progress and improvement over time is addicting and I get a big kick out of that. You can't really see it so much day to day, but any time you look back like several months or years... ahhhh yeahhhhh.
Another aspect is that this is my only hobby that feels "productive" to me. Like, there was a period of time through my 4 years at University and then like the following year and a half or so if job hunting, doing some seasonal work, and then finally landing at my current job where I basically stopped drawing, or very rarely. In school i was doing other design based work (architectural design) and so didn't feel like working this time consuming hobby inbetween course work, and then getting used to working was just draining (especially the first bit while I was doing seasonal retail) so I pretty much just spent most of my free time not spent with friends playing video games. After a few years of this I just felt... lazy and unproductive in a way? It felt like I was letting something that i had spent a huge part of my life building up a skill set for to do cool things with rot away, and that didn't feel very good. So i picked myself back up and decided to get back into it a few years ago and have felt a lot better since!
Why Comics specifically?:
This is a more complicated and nuanced topic lol. I honestly don't know why, but I've been interested in drawing comics from a very young age. The reason it has me scratching my head looking back is... I just didn't really read many comics when I was younger from which to draw inspiration. I grew up when newspaper strips were still a thing so I remember reading some of those as a kid, and I think the only comic I like owned pre-middle school was a sonic the hedgehog comic. But generally speaking I played more video games and watched more cartoons by far. But yet, I have several short comics from when I must have been like 4 or 5 to 10 years old, so evidently something inspired me to turn my drawings to stories like that LOL I just can't remember what.
After middle school though, I got introduced to the world of manga though and that absolutely solidified my interest in making comics. I never had really read super hero comics growing up, but I had interacted with the genre via animated series on tv and they never really inspired me to make my own similar content- they were fun to watch but just didn't feel really "me". A lot of the comics I made as a kiddo were either newspaper style gag comics or fan comics based on shows like digimon, yugioh, pokemon, etc. But walking into the middle school library and book fair and seeing the wide variety of types of stories available was totally eye opening to the breadth of content that comics could actually cover. So that totally solidified my interest- I for sure wanted to make my own comics now!
That said, i instantly feel into the "my first real project should be this huge fantasy epic" trap lmao. I feel like there needs to be some guard rails and warning signs around that pit anyways designing characters and scenarios for that first story drove by creative focus for like... 10 years. I never got much farther than 5 pages into the first chapter as I continued to reboot it every year or so, but I did get valuable practice in designing characters and writing stories nonetheless. Wrote out a novel version of the story up to like 10 chapters, used the setting and characters as the basis for several creative writing class short story prompts, learned how to color, draw clothes, practice poses, etc. with all these characters over countless standalone illustrations. And even in 2017 when I was like "I want to start drawing again!" as described above, my first project was going to be "the final reboot of this story (that I had started at age 12 and was now 22/3). Got 8 pages in, realized the scope was way too huge relative to both my skillset and speed, and decided to drop it and move on to newer, shorter projects instead.
And as for why continue even if it's not blowing up with popularity... is more or less the challenge of getting there, I guess. My primary goal is to build presence as both an artist and an author such that a lot of people can enjoy my work. So if my skills aren't good enough for that right now that just turns into motivation to keep working towards that point~
I think the most exciting thing for me right now is that after working seriously on a few projects over the last year and a little, I finally have enough content completed for it to be viable for me to try my hand at tabling at some small local conventions by maybe late this year or early next year, as I compile stuff into printable format and compile additional supplemental merchandise. I don't intend to ever necessarily turn comics into my job-job (as I'm really happy with my architecture drafting job and hope to grow this career even further) but I would love to be able to connect with the local community and make a little money on the side >u>