Great picture! I particularly like the black hair with all the loose strands, very realistic, and the shading on the muscles that really gives the picture dimension.

The one thing that sticks out for me is that the claws on the right hand seem to be at odd angles relative to the fingers. The ones on the left foot are great, and they give a good impression of the foot pressing against the ground, but the right hand seems like the claws are about to snap off.