Eragon book series. I hate admitting that to everyone I know IRL, because it's a total ripoff, mainstream and completely different from all the other books I read (Classic Sci-fi, like 1984, Hitchhikers Guide to the Galaxy, etc.) :C
Again, I guess as far as RL goes, fursuiting. I get think some of my friends might know I'm a furry even though I never told them, which I really don't mind all too much, but I don't want to look like the ones that people outside the fandom deem as complete and total weirdos.