A new challenger approaches

[StarSock64]

Well, I'm seeing some comfort-zone patterns

Your stuff isn't bad to look at from a glance because there's plenty of flashy stuff to make it look nice enough, but it's sorta shallow in some ways. There are some areas I bet you could improve at a lot. I hope you aren't avoiding them because of an imbalance, like, "when I do x thing, I'm great! but when I do y, I'm awful and it makes me feel really bad." I used to be that way...but really, the longer you hold off those things you suck at, the worse off you'll be. That's a really hard habit to kick. Doing stuff you suck at hurts, but it's so important... I dunno if this even applies to you, but it doesn't hurt to say it for everyone else anyway.

It's not fair to make assumptions based on just this stuff, and sometimes I do easy comfort zone stuff too when I'm trying to be fast, but do you make sure to practice other things?
The poses here are all kind of similar, especially the legs.

So you could try poses that show more characterization, or animations, or what have you...it would just be good to be more functional, I guess is what I'm saying. It might be good to try some designs that have different proportions as well. More body types, more fun.

I know the feeling might be, "how many ways can a person even stand?" But there are a lot of ways to redistribute your weight while standing, which requires you to move your legs/shoulders, and this can add a lot of character. There is also the spine, which seems to be sort of leaned back on all three of those bigger characters you did. The postures are too uniform as they are. It seems like a common problem in spriting or something, ahah.

That's just general advice. Iocus gave you a good place to start for specifics, I think.

edit:
jeez i'm pretty incoherent right now, sorry. I'm running on 2 hours of sleep and it's 2 am and help me

I'm trying to say that
my intuition tells me you might be getting too complacent. That's the vibe I get because a lot of this stuff is so "safe." I feel more of an emphasis on style and looking good and not necessarily an emphasis on learning. That's okay every now and then. I mean, it's fun to do stuff for your friends, but it's not too satisfying to stop there.

I'm just being so forward 'cause these are problems I had and I wish someone would have told me to get more serious 'cause I'd be a much better artist by now.

I wanna encourage you to supplement your stuff with studying art if you aren't. Anatomy books and light and shadow and real life and all that jazz. Try something different every now and then.