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I currently think that Darkfall does. I keep seeing examples like this:
Edit: Oh and don't forget this, https://www.youtube.com/watch?v=mXbiKdPXarw
People love playing Darkfall, despite the incompetance of Aventurine.
Who do you think has the most passionate fanbase, and feel free to provide some examples. Please don't make this thread about X game is better than Y game. Instead make it about a celebration of the different types of passion exhibited by MMO players.