Is that because you don’t like stout, or because Guinness isn’t very good stout?
The Euler diagram* that includes me and “geek culture” has a very small overlap. Anime? I like one or two, and that’s despite them being anime; I’d prefer if they were live action (and frankly, less Japanese. I find the exaggerated acting wearing). 80s nostalgia? I wasn’t into any of that stuff in the 80s; well, there is Lego, but I prefer the old Space and City themes, and find all the licences stuff a little disappointing.
Harry Potter is OK, but it’s a series for high school kids. Anyone obsessing over it after the age of 17 is a little suspect.

Game of Thrones builds an interesting world and characters, but the plot has, well, lost the plot. I’m happy to bang on at tedious length about Dune, Neverness, the Arabesk trilogy or Discworld.
I’m not sure if there’s anything that people have expected me to like specifically, though, not to the point of saying so to my face.