Stephanie Meyer and Twilight were my gateway into Urban fantasy and I want to discover some more authors.
Anita Blake series is another one you can try - she's a necromancer and vampire executioner but the stories really turn on teh head later on
If you like erotica try the Black Dagger Brotherhood series - they are completely addictive! And she has a new series coming out the first of which is Fallen about a fallen Harley riding angel!
Finally, another series recommended by Stephanie Meyer which I loved was the Mortal Instruments Series - read them in just a few days. It's not vampire but urban fantasy set in New York and another dimension. need to reread this series soon