What games had a good drop system? MMO don't qualify because people playing one put a lot more time that any player put in one single player game so you can't implement a MMO system in a single player game.
From other similar games I don't remember any having a better system. That includes, Diablo 2, Titan Quest, Torchlight, Fate, not sure for Sacred 1&2 because I didn't play them long enough.
If I check my current character, he has a dagger 20dps, it's an artifact he is using since 3 levels and I bet this character will use it some more time. Anyway I wonder what similar game picture a better system?