Here are some composition exercises from my CGSociety course with Robert Chang. I had a lot of fun with these:
Here are a few studies I did using simple shapes in Maya:
This image shows the roda (pronounced "hoe-dah") in Capoeira. The whole art of Capoeira is centered around the game that takes place between two players in a ring of people who sing and clap or play instruments. I've been meaning to sketch out some Capoeira for a long time now, and I've finally gotten motivated to get started! Now I'll have to follow through...
So here is a random sketch I did of Doc Brown from the "Back to the Future" movies. He was a great character. I've gotten more comfortable drawing directly in Photoshop, even trying to sketch without reference here and there, and gradually get better at human faces. This is the best example for now.