So I think what you're doing here is a very airbrushy kind of skinning. It reminds me most of that whole Unreal /
Daikatana era of 3d art...which was not on the whole a very good era. It's because you're shading all the way to black all over, it ends up looking very awkward. I think you can still have your speculars, just have them in addition to whatever the local value on that part of the body is.
It's meant to be black in colour so I didn't want to make it too light and so I had tried the fake specular in an attempt to reveal the forms.
I would say that my problem is that your shading looks like it's ONLY speculars right now.

Personally though I find even this exaggerated. I think with lowpoly models its best to have small concentrations of detail, but to mostly not overwork the texture. If you do you end up with awkwardly bendy and stretchy bits all over and it just doesn't play to the requirements of the art.
Also: I love your avatar, and I loved your old one too.