Well, we got already pictures of 3 different classes. We'll probably be able to change things like the helmet and other external features. I've also read something about clothes being available ( http://www.polygon.com/2013/2/17/3993058/destiny-bungie-first-look-preview ) to further individualize your character. Besides the pictures we have atm, I don't think that anything else related to their look is out yet.