. . . is the people.
I know, I'll bitch and moan over numerous people from the boards who drive me nuts, and I can't help but find d00ds entertaining, but rank-and-file AC players (at least those who have done it for a long term) are really good people. They realize that AC is not a chat room, but enjoy using it for that, and it's not Doom, or whatever the FPS du jour is. AC's a nice hybrid.
I got a reminder of that tonight. Just a few minutes ago, in fact.