I forgot about the Sacagawea dollar which did solve the fact that the Susan B Anthony coins were too much like quarters. Haven't seen one in the wild for years though. I didn't even know the other two but they're apparently not in general circulation.

Vending machines in post offices were the only place I regularly received dollar coins. Since most other vending machines accepted them, I never had much trouble using them up. The post office has removed most vending machines now so pretty much the only way I'd ever end up with a dollar coin would be if I bought a roll from my bank.