Okay, I have a bunch, so I hope you are ready. And if you are wondering, no, I did not like Twilight. I read it all the way through, and found it dull. Never read the rest of the series, as I don't care for Meyer's storytelling style.
So, here are some of my favorites.
Sunglasses After Dark by Nancy Collins - This is the first book in the Sonja Blue series. These are very dark vampire books. Lots of violence and death. But an excellent series all around.
Guilty Pleasures by Laurel K Hamilton - the first six books in the Anita Blake vampire hunter series are quite excellent. Again, lots of violence and death. After book 6, Hamilton took a right turn and decided she liked writing sex scenes. A lot. So if you aren't interested in that, stick to the first 6 books.
The Vampire Files by P.N Elrod - a little bit lighter than the first too, but still a pretty good series.
Interview with the Vampire by Anne Rice - the first in Rice's Vampire chronicles. These are good gothic vampire stories. But like Hamilton, Rice also decided she liked to write about sex after the 5 or 6th book.
Those Who Hunt the Night by Barbara Hambly - This is an interesting vampire story about a man who is creating vampires. A very suspenseful book. I believe it has a sequel, though I have not read it.
Let the Right One In by John Ajvide Lindqvist - a good teen vampire story.
I Am Legend by Richard Matheson - notable for being not only excellent, but one of the first vampire stories with an urban setting.
There are more, but this should get your started.