Hey Frank. Looks like you have some great stuff going on. Your drawings are coming along very nicely and the facial proportions seem right to me. Are you drawing from still images? If so you may want to visit the life drawing thread at cgtalk.com where they have a free workshop -they post an image and you draw it and it gets useful critique. If you have live people to draw that is also very helpful.

My only suggestion would be to look for the detail around the eye, mostly below it. You seem to be working out the structure above the eye a little, the eye itself is a tiny bit flat but I can see where you are working that out as well but the triangle between the lower half of the eye, the nose and the cheekbone is too flat, no structure -if you know what I mean.

I don't have any full face online but here is my wife's eye in charcoal

http://stormvisions.com/gallery/main.php..._serialNumber=3

For me it was really helpful to draw from life and also to study a little anatomy to understand what is beneath the skin. If you can find a book showing muscles and bones in the face and remember them when you draw it will help you stretch skin over real structure.

Your work is always awesome.