I like the hips and head alot. Like AHW said, the face made me think of a person inside. (which is awesome.)
Didn't read all the comments, so pardon me if I repeat someone else, but it looks to me as though the arm comes toward the viewer from the shoulder, then bends away as it gets to the elbow, which I think is really strange.
Personally, I don't see a problem with the size of the arm, but the fact that there's only one kinda bugs me.
The hilight at the edges of the torso's light midsection look wierd.
Aside from that, this is probably one of my favorite things from you.