

Here's my take. Hopefully it'll give you some ideas. Darkened his outlines, deleted the steroids from his shoulders, did some bleh shading, added pockets, and gave him fists of Low res rage. I changed the type of suspenders he had, but looking at it now, I think I like yours better. I really love his face, and the feet you had were fine, though a bit dark.
As Lad said, definitely just concentrate on the front view and get everything perfect there before starting work on the side. Otherwise it's twice the work and that'll just lead to frustration.