I love the idea of collections.
When I was a little girl, I randomly collected spoons (mostly because my dad traveled a lot for work and always brought me a souvenir spoon from wherever he’d been) and little porcelain animals that I stored in a glass-front cabinet. Nowadays, my collections are of the (sliiiightly) more practical sort:
I pick up vintage teacups whenever I find one that’s particularly beautiful.
I tend to immediately own any and all crystal skulls that I happen to stumble upon.