nice job mate, now ya gonna hate me and oyu probably know exactly the areas that need changing but:
the areas circled are the areas that need it...
1. The join is seeable, and texture looks stretched out.
2. this area looks as though the uvs where not laid out correctly and maybe not pulled apart big enough to actually paint on or texture
3. same here but this time the uvs are just stretched. Open deep paint and do a projection on it (if ya have dp) this would sort this np. Just use a couple of layers to blend it in
4. Teeth... this big tooth doesnt look quite right, Im not to sure what it is either.. might be that the gum needs to wrap more and have more of a "fleshy" look at the base?
5 the eye: now forgive me if im wrong but the area in the corner looks a little to big, might be this angle? if im wrong "shut up kev"
Now mike this is some awesome work... this piece of work can go down as "fantastic" so I would hate for you to just throw this all away and not do them extra tedious bits