1.) the community has a history and a sense of identity, even if its a fucked up, evil, aggressive identity
2.) many of the people Ive met are surprisingly smart, interesting and social people (for the interwebs), moreover, the players are smart and ruthless, which means youre always challenged a bit
3.) PVP has meaning, losses hurt, if youre complacent you die, can still get an occasional rush
4.) while im not a huge, huge fan of the gameworld, its unique and varied enough that its fun to tinker with
5.) RPing in a single-shard MMO is a unique opportunity unlike anything else out there