Last edited by mazouko; March 26th, 2008 at 08:07 PM. Reason: starting anew
I like your goofy "cartoon pinup" style; it's something you could definitely leverage into some fun, awesome drawings. That weird, skeleton jester has some potential as a more rendered drawing of some kind of toy or robot or other bizarre creature.
I think some tracing photo references directly would help a lot with the poses and faces. They look OK on their own at the level you're deciding to finish them, but there are a few areas that would definitely jump out if you pushed them any farther. The asymmetry of the faces is an especially big point to watch, since people are so sensitive about detecting something "off" about a face. I like the way you have the J-pop idol's forearm bending a little bit, though, as opposed to how it's straight in the picture, to make the way she's folding her hands a little more extreme and cartoony.
Back to tracing: While it seems like a cop-out, it really forces you to learn the way various shapes are put together, so you have a bigger vocabulary of anatomy later on. It's like when a sports instructor moves your limbs for you in the right way, but without people making jokes about molestation.