Damn he looks angry xP
He looks very realistic, but I think you need some stronger hilights - darker skin shows brighter and more obvious hilights than lighter skin. The general toning is good though, and the face looks ace
That is a pretty solid rendering. I thought it was real in thumb version. I think the light needs to be altered a little to make him a little more real and a little more alive.
VERY GOOD, I THOUGHT IT WAS REAL UNTIL I READ YOUR COMMENT