Favorite Villian?

The reasons I like ALL the villains shown here.

Nightmare Moon: Wicked design, badass voice, an interesting backstory, a excellent way to kick off the series.

Discord: Interesting design, awesome powers, great personality, voiced by John de freaking Lancie.

Queen Chrysalis: Sociopath, manipulative, defeated the Big Good, only villain with a villain song.

King Sombra: Open ended backstory, intimidating as heck, very savvy, based on freaking Sauron.