Oh dude, collecting things is my jam. Even as a toddler I had a massive collection of Thomas the Tank Engine trains.
I do collect figurines and other typical collectible junk (my most impressive collections being my amiibo and FNAF collections), but I'd say one of the oddest collections I've started has to be store display boxes. They're part of my FNAF collection and make the display look really neat and "official," haha. Promotional material like that is always so cool and unique to me.
TuffNuts
I've got a pretty good sized vinyl record collection. Probably in the ballpark of around 100.