My journey, at least so far, has been about getting a diversity of sets that represents a wide swath of the hobby and what's generally available out there.
I've checked off most of these (some sets and collections tick off multiple boxes)
- ex-casino, fantasy, and custom
- compression clay, ceramic, hybrid ceramic, and PIMP
- Paulson, CPC, TRK, Bud Jones, B&G
- tourney, cash, heads up
- Nevada and Cali colour progressions
- 39mm, 43mm, plaques
- poker, blackjack, roulette
- solid, spotted, inlaid, shape inlaid, stamped
Probably some other variables that I forgot, but you get the idea.