Evil vampires

So, I'm asking,why do vampires have to be evil?  I have gotten some flack, just a little, about vampires need to be evil and remain the blood sucking villains that they have always been.


Just because authors of long ago and Hollywood portrays them as such, usually, I see no reason that if corporations can be deemed as people, well maybe vampires can too.  Who knows?   Since few people know any personally anyway, I figure vampires can be anything an author wants them to be.  


They make the perfect boyfriends, always rich, offering you immortality and in Cheryl's case, a hot car too.  Give a vampire a break month!