The lure of vampires

The lure of vampires (or why they remain popular in books and movies) is, I believe, more about staying young in appearance than it is about not dying. After all, in many vampire stories, vampires get killed at ages younger than they would die of natural causes.
Youth and good looks is really what the attraction is. I am certain no one would want to become a vampire if they were to become one when old and looking old. The older, the less the attraction to becoming a vampire.
So, here we reach the deep level of attraction - sex: to be sexual, to be attractive so as to be sexual, long beyond old age.
The bottom line in the attraction is sexual. No other creature in horror stories is as sexual as the vampire.