Mine is zombie movies, books and short stories. I love watching the films. I could probably just about give you a play by play of every George Romero zombie movie ever made. Funny thing about it is how I can love them so much, but, other than some people I've met on the Internet, most people do not like them. It started when I was just a kid and I am still, to this day, a huge fan.
Anyone else have some strange hobbies or interests that make people think that you're a weirdo?