Willem Dafoe prefers playing bad guys on film, because they give him the chance to be more creative.
The actor plays a cop in new movie Anamorphic, but has made his name taking on big screen villains - from a blood sucker in 2000's Shadow of the Vampire, to comic book villain The Green Goblin in the Spider-Man series.
And he is happy to keep turning to the dark side on screen.
He says, "It's more difficult to play someone virtuous. It's less rich fantasy for me. I'm always moved when someone does something generous or heroic in a movie, so you like to play that character.
"But, in approaching it, the dark side is often more fertile."