Did a bunch of Zbrush head sketches yesterday, each one was timed for an hour:
I apologize for the corny names -- I was tired and it seemed hilarious at the time. ;)
*EDIT: So I did one today at school for the open house we were having in front of a bunch of people on the projector! It was super intimidating! Here's what I came up with:
*EDIT: Took one of the more successful designs further, and toned down the "pornographic" nature of it, as per the request of one of my instructors:
Thanks for looking!