What piece(s) of pop media have you not consumed that people would think you weird for not having consumed yet?
Just as examples:
I've never played a Pokemon game despite being just the right age where my peers were really into gen 1 as a kid.
I have yet to watch any of the Alien or Predator franchise movies (except Prometheus, which I didn't realize was in the Alien franchise when I watched it long ago) but am planning on rectifying that when I can get a chance.
Star Wars. I saw maybe 20 minutes of one film of the original trilogy, and 10 minutes of one film of the second trilogy, none of the rest. It's beyond me.
The show that taught me English because I couldn't wait for the subtitles back then! I rewatch it every couple of years, what a fantastic show! It was a long wait to get a proper conclusion when Season 5 was cancelled.
As an adult I have watched some films, not all of them and not sure which, but I still don't really like it. It's like a zoo show for kids in space. I really don't get the appeal for an adult.
I do plan on playing the Kotor games, maybe that would change my mind a bit.
Those and The Mandalorian would probably be more up your alley as an adult. Also I’m sure folks will want to include Andor on that list, but I found it to be boring mostly.