fair enough, didn't really explain myself....

I was looking at this at work, and the guy next to me and myself both agreed that the head is a strange shape. its quite elongated.
The lips are a bit odd like they are stuck on. it could be the texture, maybe to harsh a line between the edge of the lip and the rest of the skin. The skin tone to me looks like tobacco or leather or something its quite dark. This is why i was asking if it was a black guy. My colleague also pointed out that the disp/bump looks strange like it clips like the range is wrong. maybe its clamped in the shader.
I'd also say its a little out of focus and dark, i thought that might be a post process thing tho.

sorry i didn't type all this before, i generally give short answers which i shouldn't really do.

your work is really good, so i'd say this could be better, but as you say its a wip. I can only assume you posting it up you are looking for criticism and help rather than just have people say "its amazing blah blah"