Colonel Mortimer 620 tris

Hey guys working on a new low poly character and i reckon this one is looking a lot better than the last, not only that im almost done and it hasnt taken me long, if anybody's got any comments please give me some hints. For example I've had trouble unwrapping low poly heads so if theres any tips you can give me please tell me what you can. By the way I've just used screengrabs without any lights to show full geometry and texture detail.

stats:
620 Tris
2x256x256 textures one diffuse one opac