Idgaf how you feel about this expansion or that expansion. Or what parts of the lore you like or don't like. Even at it's worst patches of its worst expansions WoW was revolutionary and that's why it stood the test of time so far.
Edit: I'm glad everyone has kept this civil. I realize this is entirely subjective opinion and I don't mean to call it "the" greatest game. But something about the game, not the patches, the changes but the underlying, unchanging structure of the game itself, the classes, the arenas and pvp, the ui, the whole design of the game just offers a 'feel" to playing that none of the wow killer mmos have been able to succeed at. And the game just keeps people addicted, made a huge impact on everything etc. And definitely places it in the hall of Fame. Of course wow had it's "glory days" and its greatness is weighted towards that, but I'm just referring to the game as a whole and it's legacy. That's truly the only way I can describe it as far as mmos go is when I try any other.. it's just the "feel" of playing that I can't replicate. Even simple things such as the text and graphics contribute to that