Thanks for the comments!
The textures are just temporary, mostly because I get bored at looking at a grey mass all the time... The tongue texture is a pinkinsh phong with a leather bump map with the spottines cranked up.
For the line in the middle of the head, well spotted! Just now I am only modeling half of the head, the other half is an instanced duplicate. I still have to figure out how to put the 2 halves together without seams and lines.
I also still need to add folds and detail in the head, so I agree with the person that said it looks flat and not too fleshy. I am working on it.
I am having some problem giving it a smooth look, it seems that with NURBS, folds and creases come out almost out of nowhere.
I'll see what I can do.