Well, yeah. Kind of obvious don't you think? I mean, what's more badass than a giant, indestructible lizard that flys and breathes fucking fire? Well, maybe one that has the voice of Sean Connery, but he wasn't a villain, so I guess we can disregard Sir Connery for now. Add the fact that they feast on the flesh of men and you have one of the most terrifying creatures in both film and literature. Okay, so they aren't always indestructible, in cases like The Hobbit, they are killed by getting hit with a special arrow in a very special spot. And in cases like Skyrim, they aren't invincible, but they are extremely freaking hard to kill. Which only makes it that much more satisfying when you finally slay that prehistoric fucker and eat its soul in order to make you more powerful. Not really a whole lot else I can say about Dragons because, well, they're freaking dragons... There isn't much that I can say that you don't already know. Sometimes they talk, which can subtract from the terror level a bit, but you can forgive it when you see them tear-assing around a village or fortress eating up villagers and warriors alike as if they were twinkies.