Mesh topology

[poopipe]

hmm

basemesh wise - the distribution of detail isn't really good for sculpting - I'd take half the loops out and fiddle about out so the polys are as close to the same size all over as possible.

topology wise - there's not enough emphasis on loops circling the eyes / brows or the mouth itself to handle animation.

things to ask yourself with this sort of stuff are..

could you make him smile?
could you make him really angry?
could you make him blow up a balloon?

go pull those faces in a mirror and look at where your skin wrinkles up when you do ...