Vampires

Vampires carry an aura of elegance combined with dominance and a predatory nature; just those things which attract many women to 'Bad Boys'. Their attraction in stories relies on the possibility of their positive emotions being awoken, while the aura of mystery and danger adds spice to the mundane lives of afficionados/afficionadas.
Vampire tales seem to be a perennial, dying away and surging back into popularity again as each new generation discovers the attraction and reads, to thrill at a world of monsters lurking just maybe at the edge of the circle of firelight, beyond the lamp's glow, outside the window, in the hollow places beyond reach of the sun.