I agree on the generations of fans thing. My dad introduced me to Star Trek and Star Wars.
I introduced my nephew to Star Wars and James Bond, and Studio Ghibli. To Samurai movies and Japanese cinema. He loves Evangelion and Godzilla. My sister introduced my nieces to Disney Star Wars. The younger one is even more crazy about Star Wars than i am. I explained to them i like the OLD stuff before Disney and the prequels and they basically said i’m a fuddy duddy and a stick in the mud.
My niece loves Jar Jar, Ewoks and any BB-8 and any other thing that people seem to dislike about these movies. I still joke with my nephew over his fear of the blue elephant guy from Return of the Jedi, Max Rebo. He was afraid of him when he was little.
I’m also a fan of all those franchises mentioned by canofhumdingers except Harry Potter. I’d add in Gi Joe, Transformers, Voltron, and He-man. Though i haven’t collected those since i was a kid. I also amassed a collection of matchbox cars in the boxes. Collected Sports Cards and non Sports cards. And every video game system from the Atari 2600 up til Xbox 360 and Playstation 4. Except for Sega Saturn, or Mega drive, or Neo Geo.
I always wondered if my Grandma owning and operating a flea market and me having had all the star wars toys made up until before the release of Return of the Jedi, had anything to do with the collecting bug.
We used to go to ames to buy the transformers in the box and go to the comic shops, my grandma seemed to think there was going to be value in these as an investment. I’m not sure she was correct. Only certain collectibles end up being worth something.