Honestly thats a damn good head. Ive been trying to model heads for ever and dont think any of mine has looked that good. Im jealous Did you follow a tutorial? If so please point me in that direction.

The only thing that looks a lil odd to me is the edge just below the eyes seems to be pushed in instead of pulled outward. Other then that its looking very good. A good texture and the little flaws would probally hardly be noticable.