I've moved the ear forward slightly I felt it was back to far.
Started adding more detail to the forehead.
Still adding...
Another angle.
A closer shot, showing the details on the forehead.


...And another one.
When a poly mesh starts getting high it gets harder to tweak and shape, I use deformers like a lattice or clusters to make it easier to deform areas.
The head so far.

 

View from another angle.
I've added more detail at the top of the nose, these will be used for some facial poses.
Here's a close up of the nose, a nice flow of edges.