First head sculpt!

loggie24

I am sculpting my first head to get my head off environment art. At first i tried making a likness sculpt of Tom Hardy, but i fell of the train about mid way through. Would like some thoughts on the progress and what you think could be better. I am yet to add microsurface details on the model as i'm on the look out for good skin displacement maps (that aren't $$$).

Cheers.