It's cold, there's no emotion, and you have to psychologically realize that this vampire has slept with somewhere upwards of 10,000 people because of their age, and nature of seduction. Oh, and they view you as a slab of meat, and could realize that fantasy at any second without much effort.
Give me a werewolf any day (pre-change, of course). It might only last a few minutes, and you might be dead by the end of them, but I guarantee you that it will be the hottest, most passionate, and rough sex you've ever had. Like angry sex x10000000000.