Head modelling practice

I have been trying to get up to speed with head modelling in blender.
Here is what I have so far.



Here is the wire frame


How can I improve on it?

Looks really good already:) the only thing that i would change is break the symetrie of the face since no human face is perfectly symetric^^ but that would be a step that you would want to do after modeling is done:)

Thanks for your suggestion.
What you say is true but I plan to put this on blendswap as soon as i complete the ears and eyes.
I am more interested in stylized models and I am just using this to get myself familiar with modelling facial features .

Cheers
Pat


I have added the ears now.
All that is left is some proper eyes

This is as far as I want it to go in terms of parts. You suggestions are welcomed.