Vampires are everywhere these days — call it twilight for originality. All you need to sell movie tickets or cable TV subscriptions, it seems, is to call in the undead. What attracts us to bloodsuckers? It can be as simple as their eternal hottie youth, or as complex as how they make pacts with the devil in exchange for immortality. Either way, audiences aren't even close to putting a stake in the heart of this craze. So let us praise the actors who vamp with style, and stick it to those who don't have a clue about true blood's essence. Here's a countdown of the 10 best — and then the 5 worst — vampires in movies and television.