What's great about the 'Vampire' aesthetic is that so many different styles fit into it:
Glamorous (Chanel, Dior)
Romantic (Givenchy, Lanvin...)
"Va-va-voom" Vampy (Anything a la Dita von Teese)
Punk (Ann Demeulemeister)
(80s) Rock (I've seen some interesting Balmain)
Sexy/Perverse (Gaultier)
Regal (Long live McQueen!)
Modern (drapey Donna Karen, Gucci)
Emo/Burnout (Alexander Wang)
"Ethnic"/Non-western/Boho (again, I'm recalling some Gaultier)
Grecian
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There's also a huge variety among time periods and settings as well.
Personally, I'd like to think of a desert-dwelling vampire, setting in on hapless nomads at night, reaking havoc across the Sahara (yes, I have a very active imagination)
Givenchy Fall '09 Couture, style.com