Nice job, man.
I think you pulled off a great 'slightly-exaggerated' visage - excellent subtleties in the mouth, ears, front-neck, and brow. I like it.
If I may: - I'd be careful about the direction of your creases and wrinkles in the face - many of them are great, but some pull in directions where muscles don't really pull - like the ones from the corner of the mouth to the outer-jaw... maybe some contrasting angles would help - in the neck, as well. (this is, of course, very small - your sculpt is great).
I'd love to know how heavy you apply the turnpenoid - and what kind of brush you are using.
Also, what tools are you using to get the great wrinkles and creases in the skin?