Whereas in Dungeons and Dragons while there is the element there, it's not always that. But here it seems to be constantly the quest for power and position. Richard Marks is a counselor who studies the occult. He says America's fascination with fangs is growing. They're not really the evil people that we used to think of them as.
Compassion comes out of the one who views the movies.
So we now see them as somehow erotic because of the strong sexual connotation to vampires. We see them as lonely sometimes. So we're now evoking human compassion out of humans towards someone who is dead. Consider the last few years. Anne Rice's Interview with the Vampire was a blockbuster, all the while embracing the erotic side of vampires.