So my favorite vampire movie is ... The Lost Boys! I have this weird thing with vampire movies, where I don't like a lot of them because vampires really creep me out. I don't know the blood sucking thing doesn't strike me as sexy, but really gross. That and Dracula really frightened me as a child.
ANYWAYS, that said I love Lost Boys! It's from the 1980's so the fashion and music bring me enjoyment in a 'hahah, oh my god I would have killed for a skirt like that.' kind of way. And okay, so I have the soundtrack on my iPod because who doesn't love INXS? Ahem. Beyond the music and the fashion however I like the movie, it's got some pretty silly humor but it's all very self referential. I love movies where the characters don't act surprised to find themselves in a vampire movie, or rather they might act surprised but they know the rules. The movie is just so quotable, so that's fun as well.
I enjoy the vampires as villains, and I am a sucker for siblings on film, or in prose. So it's just a whole mess of things I love.