Collecting liquor, wine and whiskey bottles from various countries I travel or that I find in a shop...and only use them for special occasions and parties that I do at my house.
Matter of fact next time I am throwing a party I might just offer the alcohol myself (and not split it with others) because I have two boxes full of alcohol that they can just close but are next to un-closable if I had more.
Funniest thing is that my Turkish friend laughed her ass off when she noticed I drink less than the average Turk.
I USED to collect Funko Pop but then realized 99% of them were non-collectibles and worthless and probably will never have actual value! I kept only three : one of Brandon Lee's Crow as a present for a brotherly friend, one with Walt Disney and one with Donald Duck that are special editions of the 100th anniversary, which MIGHT ACTUALLY hold value in the future BUT not counting on it.
I used to also collect books and reading about 70% per cent of them.