Personally what bugs me about most of these and is the main reason I haven’t bothered to invest much time or money into playing is the “requirement” to join a guild ( or aliance, or corporation, or faction or whatever that particular game calls it ). These games have become the equivalant of growing up in an inner-city environment where you either join a gang or you are going to be abused by other people in a gang.
If I want to play a barbarian warrior out to win a kingdom by his own hand, or the loner scoundel space pirate chasing the next contract while staying one step ahead of the authorities, I should be able to. If the mechanics or environment of the game force me to be a member of a guild in order to have a reasonable chance of success then the game is robbing me of my ability to role-play the character I choose.
Of course, I don’t have the solution to this problem…yet. When I do, I’ll let you all know where to sign-up. 8)