Old Warhammer metal miniatures, old MTG, Pokemon and other obscure cards, old Pogs and Gogos Crazybones
Wild west and some european comics. Books, mostly classic trad lit. I also like to save the stamps from other countries when I get them, local ones I just re-use lul
2ND QUESTION: Did you collect something else but quit?
I quit almost all media collecting, including five to six different consoles of video games, every form of physical movies and also CDs. Got rid of those. As a kid I had a bottlecap collection but those are also gone :(