Hmm, Okay the shading and detail is pretty good, what I would expect from any Gu member but the metal neck piece wont map well in-game or in global. The bottom light I don't understand why you did because it wont show up on the head it map show a tiny bit however. The head is smooth and has good shading as I said before but it doesn't really look like metal.
Ps. I thank you because just by looking at the head I learned how to do a more realistic light effect :v