looks pretty nice. mh...the eyes seem pretty weird, maybe you can blur them a bit more just to fit them better, imo. sorry cant say if its your best im pretty new here and i havent seen more of your stuff yet
It's not too bad. Just the perspective is kinda off. =\ Like it's just the head. I wouldn't have used that render because of that problem. Keep it up though, your effects are looking better and better.
I think, for the effect you were going for, a tanish, cave wall, color would've fit better. And the lighting is a bit too strong. Rather than that 45 degree angle from the middle, go for a 75 degree angle from the middle