The arms look too thin, unnatural.

Huh. It seems the light source is directly between the viewer and the piece. It looks somewhat pillow shade-y.

 Thanks for the remark. I will keep that in mind. :]

I think you're shading everything as if it's one type of material, and just going around the edges with shadow too much. It needs more distinct shading. Cloth shouldn't look quite like that.

The bit on the black side of the hood came out well. :)