They don't want the same things out of MMOs, they don't share the same MMO backgrounds or experiences, and in many cases the happiness of one group equals the unhappiness of another.
Some people feel that MMOs should cater to as many different groups as possible, but can they? And should they really? Personally I don't enjoy going to Rush concerts with people who hate progressive rock, nor do I enjoy going to Georgia Tech football games with people who hate football and/or my Yellow Jackets. So why would I want to play MMOs with people who hate sandbox mechanics, crafting, or any of the other genre conventions that I prefer?
What do you think, Leaderboard readers? Can you co-exist with MMO neighbors who don't like what you like? Vote after the cut!