Okay, the vampire thing

So, as I've toured around the US I've been asking 'who wants to be a writer?' and there's been a fair response. And most of you seem to be writing vampire stories.
Why?
Hasn't this bandwagon rolled? Does the world need more vampire books?
First, let me state I was reading vampire fiction before most of you were born (okay, not before Jon Mayhew was born). I love vampires. Like most of you, I went through a period (brief, but distinct) when I wanted to be one. Or maybe it was just me? Alas I'd h...