So cute! These would look great as figure keychains

Your mini chibis are so awesome! :3

Looking through your gallery, I can honestly say that you're terribly over priced.

I'm sorry, but your work is just not very good at all.
Your anatomy needs a lot of work. Try looking at references of people who are in the same pose that you're going for.
Google is your best friend for such a thing. Even if it is anime, you need to practice your realistic poses and dimensions.
As for your coloring, I feel it could definitely be better. Everything is so one tone and there's no real human look to them at all.
Having basically one tone makes your characters look dead and boring.
As for your poses, again, use references and try to change it up a bit. Sketch out different possibilities, draw upside down, look at models.
The hair also needs work. Again, anime does not excuse lack of realism.
I'd also work on the faces. You can use anime and still be realistically correct.
Look at how faces are constructed and where things meet up. (i,e ends of mouths meet the middle of the eye, nostrils meet the beginning of the eye, etc)

Your chibis are actually okay for what they are, but as for your non-chibi stuff, it needs work.

Hello, I saw that thing on A-C and I extremely disappointed, not only is it fucked up that you would pick on another person who is significantly younger then you, the fact that you feel high and mighty about your art and saying theirs is horrible is just plain rude. your art is mediocre, but I'm not going to be that blainent about it.
Your anatomy needs allot of work, your posses are bland and repetitive, your faces are even more so, Your characters lack emotion.
About the coloring: It's a little shiny, needs more depth, look into some tutorials perhaps.
Here's a wrap up: Your art in general needs more flow, the characters just seem stiff, your color and expression could be less bland and tasteless. I proscribe a nice healthy dose of tutorials.