Now I can't imagine why you'd want to use one of these when literally millions of other people have them too -- isn't the point to be unique and personalized? However, if you were to Photoshop one, mess around with it perhaps, make it your own, well sure! (Each image here is riffed off of some classic cinematic image, some more obvious than others. Can you identify them all?)
On a somewhat more personal note, everyone around here is really excited by all the avatar personalization going on. It hasn't been a week and already you can hardly go to a movie page of reviews without seeing one of your little icons. That's really quite remarkable considering there are more than a million reviews. Enjoy.