Opera in the movies is usually for lovers, moments of victory (like 'Nessun Dorma' in 'Bend it Like Beckham') and the occasional bright spot in an otherwise bleak life.

But a taste for opera has also become a tried-and-true way to showcase that the villain we're watching is more than usually twisted. In his new film, 'The Killer Inside Me,'Casey Affleck plays a small town deputy sheriff whose homicidal tendencies are well-masked from everyone who knows him. But, if they'd noticed his surprising fondness for classical music, they might have gotten a clue: only psychos listen to opera!

Here are a few of cinema's most heartless bastards, gangsters and other heavies whose music choices are just one manifestation of the depths of their depravity.