Cheating, PKing and just plain poor sportmanship ruins the game for me. Baldur's Gate is ridiculously easy to cheat on, as is Diablo. D2 is a bit tougher, since they keep a copy of your character on their site. But someone will find a way. I've more or less sworn off online RPG games because they simply don't work.
MUDs are mindless killing sprees intermixed with lewd remarks and poor spelling.
You get a sense of community that you never get with games like Baldur's Gate and the like. Check them out. Contact us for more information on GameSpy Industries.