Diablo II is easy compared to Nethack. I love them both, but at least in D2 you know what a potion does when you pick it up and none of the equipment is cursed.
There's no feeling quite like being surrounded by too many monsters and looking at all the unidentified potions, spell scrolls, and wands in your inventory, choosing one, and hoping that it will magically teleport you out of trouble. (Only to discover that it was a cursed scroll of fire and now EVERYTHING is on fire.)