That is pretty nice although I think the hair are too green, they should be more of a brown, light brown at the to of the head.
I also think that the ahir on top of the head are a little too puffy.
Okay, so I agreed with those of you in my customs thread who thought the hair was too green, so I went over it again with the magic airbrush. Here he is again with darkened hair. And, no, I didn't just Photoshop the first pic. I just took the same angle shot and framed it the same way.
As for the puffiness of the hair on top, I think the angle of the head is adding to that effect. This shot is very tilted forward. You can tell by the curve of the neck's bottom edge.