The best feature in my mind here has got to be the complicated item system; these games are really all derivative of Diablo 2, but none of them have managed to match the complexity of Blizzard's masterpiece action/RPG. Champions takes us one step closer to that, though, by including a ton of item combinations as well as unique items. On top of this, shops will even sell a random selection of items that matches your character's level. One of my biggest pet peeves in the Dark Alliance games has been addressed, but it's taken quite a few games for it.