I really like it so far, but still some way to go.
The scales would be nicer if they were all over the head, and not just the highlight. The highlight itself is a bit too strong, so that needs to be dimmed slightly. The green needs to be desaturated slightly and the back images raised slightly. The mouth needs to be re-worked and the eyes raised slightly.
I am loving the back a lot, its a really nice idea. Even tho the eyes need moving, they are the same style as my current and are quite nice. I'm confused with the text, but its a nice random added touch.
Keep going.
Sorry for giving so much feedback, but if you learn from doing this then not only are you great, but you will become a great asset to this community. =D