Have you read any of Amelia Atwater Rhodes stuff? She writes all supernatural books, she has a series about shapeshifters, and some books about vampire and witches.
Also L.J Smith does some good vampire fics.
Also check out the Black Dagger Brotherhood by J.R. Ward, that's got some kinky vampire sex in it...
Ummm....The Midnighters series by Scott Westerfeld is okay. If you want something similar to Twilight but more...non-teenager like, you could try The Host (it's by Stephanie Meyer, like Twilight). These are sort of romance/sci-fi/fantasy type things.