What is so good about being bad?
We root for James Bond and "Alien's" Ripley to win, but they're at their best when they're matched with a charismatic baddie. Sure, we know Bond will triumph in the end, but we need to believe — at least for a couple of hours — that the villain will get close to shutting down the power grid or laser-beaming the Earth's core or whatever it is he wants to do. (Unfortunately, it is always a "he" in Bond movies; how great would Anjelica Huston or Jessica Lange have been as a 007 archenemy?)
Bond doesn't mess with gray areas; we always know the titular Goldfinger and Le Chiffre from "Casino Royale" are rotten to the core. They're the kinds of bad apples we hope will be devoured by wild boars, a boldly hissable form of villain that can be loads of fun.
But so can a more human kind of evil. Think of Barbara Stanwyck's Phyllis Dietrichson in "Double Indemnity." She's up to no good but Stanwyck is so seductive and funny that we're almost willing to overlook that she wants her inconvenient husband and dopey lover dead. Part of the kick of the movie is that nobody can keep up with Phyllis, so in some skewed moral universe, we cheer for her. (Depending on the movie, Hannibal Lecter also qualifies as a bad guy whose side we take.)
The bad guy is often more mysterious than the good guy, so rooting for them can be a fun way to watch a movie. What if I understand where the "Mean Girls" are coming from when bland Lindsay Lohan walks into their lunchroom? What if I was ignored for so long that it was hard to relinquish the little power I finally acquired, like Nurse Ratched in "One Flew Over the Cuckoo's Nest"? What if, like Norman Bates, my "villainy" is a product of abuse suffered since the day I was born?
I'm not even sure Anthony Perkins' Norman is the villain in "Psycho," or that Margaret Hamilton's Wicked Witch of the West is in "The Wizard of Oz." They're another kind of bad guy, written and acted so we relate to what makes them bad. Of course the witch is miffed — Dorothy killed her sister. If Judy Garland weren't so infuriatingly lovable in "Oz," some might say she's the antagonist.
Perhaps identifying the villain depends entirely on where we pick up a story: A younger Norman Bates might have been a great guy to go fishing with, and "Mean Girl" Regina George probably became a better person later when she figured out what to do with her anger.
Our sympathies, or lack of them, can also change our take on bad guys. I considered two Kevin Spacey performances — "The Usual Suspects" and "Seven" — for this list of the best villains, but they're hard to watch, given what we've subsequently learned about an actor whose malefactions are all too real.