I am Legend by Richard Matheson
The Keep by F Paul Wilson (or something like that)
The Historian
Dark Lover by JR Ward
Anita Blake series by Laurell K Hamilton ONLY up to book 8 or 9 though
Interview with the Vampire, The Vampire Lestat, Queen of the Damned all by Anne Rice (stick with the first one, it's worth it in the end)
Sookie Stackhouse series by Charlaine Harris
Undead and ... series by Mary Janice DAvidson
Minion by LA Banks
Salems Lot by Stephen King
Let the Right One In
Dracula by Bram Stoker
Personally, I wouldn't even bother with the Twilight or Vampire Diaries series - they're both overhyped pants. There are so many other good books about vampires out there.