I'd say that there are definitely some RPGs that pall if played too often, but since with Icewind Dale you can create different parties, learn to fight in different ways and try being evil and good, I think you get the most out of it if you play it more than once (although, I haven't quite yet finished my first time round yet.......). Saying that, Vampire the Masquerade was not a quarter as fun the second time round, so I guess it depends on the game.