The only MMOs I can say I really enjoyed were CoH and Age of Conan, which was the closest thing to the sword and sandals MMO I always wanted. But like other games, it had a difficulty wall; it also had need and greed drama, and raids where you just couldn't play a melee character because you were constantly being told to break off and stand over there. This involved too much catherding. Live voice chat, immersion breaking, was absolutely necessary to do it.