As previously stated, definitely work on the specular map as well as skin bump. And fix that highlight on the lips. You only need very subtle highlights on your diffuse as your AO map should sort most of the depth issues there. Focus more on the colour and texture.
It's looking okay so far, you should definitely paint a separate spec map to get rid of the wax feel. Why is there grey around the lips? It looks like shadows are painted around the eyes... generally you shouldn't paint light/shadow directly into your diffuse map.
The real dealbreakers are those ears man. You've obviously invested a lot of effort to craft a compelling face, but the ears scream "aw, fuck it...thats good enough". You need some more geometry in the eyelids/sockets. You've got some bad poly clipping there as a result. Also, its the rare person who's neck is wider than…