With MMOs diverging from the normal featureset with every new contender, it is becoming more and more difficult to compare how they measure up to one another. The only point of convergence across all the major releases is their /dance command. And, even though it is still not released, if this video is anything to go by, Guild Wars 2 is leading the charge.
Oh, what am I talking about. I can't pick favourites:
More of this sort of thing.