I have edited the body proportions, tweaked stomach, arms and legs.
I have also worked on his buttocks (i will not do much detail as he will be wearing pants), back and neck.
Head edits: changed sunken features in face, narrowed nose, made rounder, added eyes and eyelids.
Scene edits: changed background colour, added some lamps to illuminate certain sections.

A couple problems i ran into, the legs look fine from front and side views, but when rendered (probably because of the lighting), they look exaggeratedly thin. I would enjoy suggestions about this but i wouldn't worry too much as i will be adding pants. Also, as you will see in the picture later, his face looks all screwed up when i set the rendering dimensions to 50%. in the 100% render his face looks normal. Also in the head-closup renders. what can be causing the disfigurement.

Looking forward to complete this mesh soon: then i can rig it and begin on other characters.