The Hamiltons (2006)

Creepy vampire movie with an original plot. "The Hamiltons" are a group of emo young adults who live, argue, cause problems, and generally act like any other dysfunctional family. There's younger brother Frances, who mopes around with a video camera and tries to avoid attending high school. Older brother David tries to keep the family intact (both parents have died) while goth girl Darlene and her twin Wendel cause a lot of grief. Youngest brother Lenny is particularly a bother.They also have to deal with social workers.
There's just one problem with this party-of-five: they're vampires. They don't burn in the sun, but they need a lot of blood to survive. Human blood.
Although I get sick of movies which try to present the vamp's viewpoint, this one impressed me. It sucks you into it's own twisted world and attempts to answer the question: Just how does a family of serial killers justify what they do?