Like FFXI, WoW has a decade of history behind it (or it will this year). TBH, I preferred EQ2, but no one I know played it. To me, the single most important part of MMOs is the ability to play with others. They're built on communities and they fail with their communities. All the fancy features in the world won't help a game if it's full of asshats or the community falls apart. Blizzards efforts to make WoW more social have actually had the reverse effect. The best communities left are the various forum groups.