Yeah maaan - Looks sick! Did you a custom matcap on the turnaround or just tweak spec settings on the default?
just a little gradient in photo shop. the matcap is one of the Fredrik Storm matcaps If I remember correctly.
Love that mouth torso! Do you also convert these guys to game models or do you just do the concepts?
Yeah this guy was retopo'ed down and generated the ingame model and Texture from an Ambient Occlusion Bake.