Why Vampires?

When thinking of Vampires I think of blood thirsty males who seek out people to suck there blood so they can continue living. I really think Bram Stokers Dracula. I have never read the book but I have seen the movie plenty of times. Now you look at these new vampires the are all about love and lust, like in True Blood and in the Twilight series. Why do the people who right these movies and pilots for these shows think that what people want to see? Along with the the vampire crazy why do people love them so much and why do they love the new vampire more? I personally like the old one more but I still found myself interested in the new vampire to. What drives the the vampire craze? What makes the love and lusting vampire more attractive than the dark sides blood sucking Dracula? They even have a children cereal now for kids so it is drilled into our heads at a young age.