Hi! I just read your forum thread over at Hentai Foundry... interesting stuff. I'm in a similar position myself, but people won't tell me what's wrong with my work, so it's difficult to improve.
Actually, if you've got the time and inclination, i'd really appreciate you having a look around the 'Babes' section of my gallery and telling me what you see wrong with my work (please). If you'd rather not, it's okay, but i can use all the help i can get, you know?
What i'm also interested in, and i don't mean to get at you when i say this, but if you don't like your art, why are you open for commissions?