Eh, i don't think it should turn into every other RPG where we have to go rescue someone's cat, but the randomized quests in the original diablo were definitely part of its charm. You can't really say side quests in a Diablo game wouldn't fit, because the original Diablo only really had one non side quest, and that was go down and kill Diablo. All of the side quests in Diablo are somehow important, helping the town, or gaining new rare artifacts to help you on your way to kill Diablo. I dont want a massive amount of quests just for questing's sake, but ive yet to see a game recreate the randomized quest system the same way Diablo did.
1