Blue is how you shaded it Red is shape of the helmet
I'm not completely sure if I'm right; but, I think there's a seam going down the middle of the texture which affects the shading from the helmet between the eyes on the nose, as well as a few places on the helmet itself. It might just be me though...
Whoa that flat is looking pretty nice It maps out pretty nice too. Face especially around the eyes is wicked hard to see because of the shading from the helmet, unless thats what you're going for but I think you can fix the shading around the eyes looks because it looks a bit off, the shading kinda splotches/doesn't look like it blends well, there is a seam in the back where you c/ped the other side by the blood waterfall coming out of his helmet. Other than that a beautiful piece nice one!
Edit: I just realized that the shadow you made for the top part of the face is backwards too the top of the helmet is an -M- shape and the shading is more of a -W-
Blue is how you shaded it Red is shape of the helmet