I like to do my own... I'm thinking of a shot of Bill the Butcher from the first scene on the second disk of Gangs of New York, but I'm not set on it. I may go back to my first custom avatar, or make one similar to it.
Vorian is one of the characters from the Legends of Dune series by Brian Herbert and Kevin J Anderson. He's the founder of the Atreides dynasty, from which the main characters of the rest of the Dune books come.