If you enjoy intelligent stories about vampires, I strongly recommend you rent the Swedish feature film Let the Right One In.
Based on a bestselling novel by John Ajvide Lindqvist, it follows Oskar, a sensitive 12-year-old boy who is a constant victim of bullies at his school, and Eli, a dark and serious girl who moves in to the apartment next to his and who comes out only at night. Her arrival coincides with a series of gruesome murders and mysterious disappearances, but even as Oskar begins to suspect what Eli really is, he cannot forsake her. Despite knowing she is a monster … he loves her.
This was possibly one of the best treatments of vampire lore in a film that I have ever seen. I strongly recommend that you rent and/or buy this film at your earliest opportunity.