I like it, I think you could make it a tad brighter because toribash tends to make all the textures a bit darker than what they actually are because of the lighting of toribash. If you map it like this you can add the eyes close to the top of the head on the backside so it looks like he is looking upwards, might be something you could try out, or don't, your choice ^^
sure one of the best heads you done.
It looks so well mapped and there is no distortion on the sphere.
keep refining it, I advise you to use highlights on the tooth to give it detail and focus attention
tip for highlights:
-you need to see the contrast in it to make it work, put all the tooth medium/bright gray and then add some white on top, it will work most of the time if you put the right specular fuzzyness.
You can see it working on minds head, I do it too, with tooth mostly.