I would have to have that in terms of Anatomy and the deformation of the body is great, you could improve the lighting of the scene.
Because this drawing looks very flat. if you added more light to one side and added a casted shadow it would improve the overall quality of the artwork.
One quick advice from me is to add a Back light. Use this picture as reference.
Cool, thanks. You're definitely right, it does seem a bit flat; enhanced lighting would be helpful. While drawing it, I didn't really think about it, I just used one of the references and focused on the cloth and the anatomy. I'm going to leave this one the way it is, but on the next I'll add my own lighting. Contrast does really affect the finished product.
Anyway, thanks :D