I was going to write a provocative gripe about people who say they've not watched something to prove their intellectual superiority but then I remembered that I've not watched any Harry Potter and I'll happily tell people so (et voilà!). I too am not sure where it all came from, one day I walked out the door and everyone seemed to be clutching a copy of the tome. Who knew there was a latent tendency towards wizards. For reasons unknown I ended up trapped in a game of Harry Potter Trivial Pursuit (and I'm the sort of person who would rather bite off his own toes than play that game) at the weekend (at least it was in the pub and I could go to the bar often). I fear I didn't contribute much, but I was more than a little scared that some friend of a friend, an unassuming woman of middling age, knew every-bloody-thing about the books. It's was the sort of scary level of knowledge that had happily skipped over the borders of obsession and pitched camp. Had probably built a house.
I did sleep through large parts of the LoTR trilogy and never, ever felt the need to pick up a Tolkien book. I'd rather have my eyeballs kebabed than watch The Hobbit, even people who like that kind of schtick seemed to leave the cinema looking like they had just suffered a bodged prostate exam. Even the women. Wizards and magic never levitated my boat. I don't think I was good on sci-fi to be honest, I never really watched Star Trek. My wife once made me watch Voyager and DS9. Oh god, it was like a soap opera in space. I did love Firefly, which was inarguably a western in space, and should have run forever.
Possible a function of my childhood, where I preferred graphic novels. I'd eagerly await my copy of 2000AD and rustle up a few pennies sorting through the comics (oh we called them that back then, I'm not sure when they became graphic novels).