It's more the lack of space opera that's annoying than the vampire glut. There are, what, two or three vampire shows on now? That's not outrageous. Post-apocalyptic scenarios are the flavor du jour that's sucking up too much bandwidth right now.
Personally, I've never found a vampire show I can really get into, because the whole schitck seems very limited. But there's always the possibility of a show that upends the rules in a way that makes the topic fresh and interesting.