My least favorite bit about werewolves and vampires (and with vamps I can't get past the fact that they're pale and DEAD, or close enough) is the whole Fated Mate thing. I've had enough of that particular set up.

Oh, and for me the vamp shark jumped right out of the damned pool when I read about a vampire getting nutrition from a menstruating woman. Errrrrrrrgh. Pleh.