Is it normal i only like older guys?

Since I've started to sexually experiment, I've found I'm only attracted to older guys (I'm gay). Like, way older than me. I lost my virginity when I was 15 to a guy who was 48 years old. I've had more than a few *sexual* partners since then, and the youngest was 44, and the oldest was 67 - and the most fun I've had was with the 67 year old. Something about the age difference gets me going, and I don't really know why.

As for partners I didn't have sex with, I tried to get something going with a former classmate of mine...but I just never got into it.