I second the great shading, blending on the clothes, but, for me, the shoulder area could use a bit of adjusting, mostly the hunchback elephantitis shoulder.
Thanks for posting it as a work in progress, for my own work, I always lose the appeal that I like in the line-art/rough when I finsh 'er off(that's mainly what I'm working on myself-you know wonky anatomy, etc, etc)...