Screw making Vampires a race, just leave them as a monster type. All they do is drink blood, turn into flying rodents and burn away in the sunlight. That'd cut down your effective playing time to half, meaning you can't even leave your house for most of the playable day.

Instead, let's make a playable race out of the Qu tribe from FFIX (perhaps around the time of Blue Mage implementation? ;D). None of you can deny that it would be absolutely amazing, running around as a giant Lickitung with a battle fork, eating everything you can find. ..... Kind of like smaller Goobbues, now that I think about it.