I have...a couple of collections. A bunch of Game Paks. I never had a Game Boy of any sort when I was a kid, so I collected a bunch of Game Paks and a few Game Boy handhelds. Some DS games. I've also bought plenty of Switch games. I don't even know why I kept buying them when I keep playing the same few games. A LOT of Yugioh cards. And a select few different cards not Yugioh, such as a few Pokemon cards, and a few Animal Crossing Amiibo Cards. I do like figures, statuetes, and plush toys. But I don't get these anywhere near as much as video games or Yugioh cards due to lack of space. So I have a few Nendoroids, a few plush toys (mostly Pokemon), Lego minifigures, Transformers, and Super Smash Bros. Amiibos. I even have two big diecast cars and two Hot Wheels cars.
I even kept a Japanese and Korean newspaper!
Also: While home consoles and computers are nice, I really like to collect small electronics and handhelds! I wanted a Game Boy Micro for over a decade, and got one two years ago! A Game Boy Color, that Super Mario Bros Game & Watch from last year, and had a Pokewalker years ago. I also want to get an emulator handheld or two in the near future. And a Pokemon Mini at some point. Maybe a Tamagotchi at some point.
I can elaborate more on these, or even share pictures if anyone's interested.