I've been playing Diablo II for more than a year now (with the expansion) and I still love it. Very high playability, simple plot, lots of fun. I especially like the multiplayer function over LAN, because then one player plays a melee character like the barbarian, and the other a spellcaster like the sorceress or a party leader like the paladin. They really compliment each other. I suppose some people will tire of the game, because it doesn't change much over time, but finding great items, getting good experience and building the ultimate character is wonderful.