Well lots of times I've wanted to quit doing art for good but something has always stopped me from that, myself.
Hear me out as I was the one who got me started, it's basically the best explanation for why I don't post as often as I'd like. Sometimes you feel like your art is the absolute worst and other times you feel like you need to rely on a gimmick or requests just to get recognized but actually you don't need any of that.

Doing requests will without a doubt attract some of the worst people you can find in this fandom and relying on a fetish can cause stagnation in your art (although there workarounds for this) Also certain gimmicks can trouble to artistic development. What I'm trying to get at here is do art for yourself, improve for yourself, it's okay to be a little selfish if it means you'll enjoy yourself. What good is doing art if it's not fun in some way?

Ive seen many an artist with a mediocre style have loads of followers and it used to piss me off but over the years I've noticed that those guys have pretty much fallen off the radar (or at least mine) but I gradually improved a little, became a little more confident and kept my mind open to learn, it's great. I've learned that it's easier to be recognized for your style by varying things up, doing more than porn/fetish stuff and putting fear aside.

Being an artist can be a real pain in the ass but I can't exactly give up at this point, so when things get a little too unmanageable even for me I take a break, managing stress is another part of keeping your passion alive. That being said my mood gets really screwy at times (blame home stuff) but I still enjoy art websites in general, I met lots of people here many of which have encouraged me to stay and create art.

One final thing of note, don't feel obligated to draw/ take commissions if your not in the mood or aren't in good enough health to do so.