Vampires try their darndest to live among humans. Bruce Cambell, need I say more?
http://www.imdb.com/title/tt0098412/
"I'm gonna kill me a rasta-vampire!"
Any movie that has a flock of good vampires trying to get a synthetic blood supply and are referred to as "bottle-suckers" by the more old fashioned vampires that prefer their blood from the handy jugular containers is pretty good.
What, to my mind, makes this one worth seeking out, is that it is one of the few horror westerns or western horrors out there.