From what I can see...

You have a lot of triangulated geometry and some n-sided faces (thats polygons with more than 4 sides to a single face). It is really scrappy and has not got very good flow.

Also the there are a lot of hard edges due to the method you have used. My tip at the moment would be to clean up all un nessacery edges, faces etc, without loosing the shape of the head.. Once your happy with the flow of the geometry ans the look, then start adding detail. by refining areas that need definition.

Beyond that are you going to convert to Sub-D or NURBS?