Answer: They're bloodsuckers.
This one seemed to be pretty easy - everyone who answered got it right: EricBess, Limited, Lythand, Melkor, mythosx, Oversoul, Ransac, rokapoke, sageridder, TomB, train, and turgy22
Scores:
EricBess: 10
Oversoul: 10
TomB: 10
train: 10
Melkor: 9
rokapoke: 9...