the skin colors and shading is really nice, but I think more contrast in the hair and blue scarf/sash would help with the "too flat" look k_e_t_t_e_l is talking about. I thought the glasses turned out pretty good too
The shirt looks kinda flat because of the unvarying pattern. I can see the wrinkles on the fabric, but IMO it's not enough... Other than that it's a pretty cool piece