Die2Nite, I try to be as quiet about it as I can. I walk in, nod my head at a few people, and settle down. I also try to figure out the pecking order of the town as quickly as I can. There is almost always a pecking order. If not, it's a town of chaos and likely won't last longer than a few days of zombie invasions. I've played long enough to recognize players who are trying to lead, those who are willing to follow any instruction (even if wrong), and the fact that most players are content with popping in, making a few moves, and logging out.
The town I am in at the time of this writing is called Plagued Sanitorium. The names seem randomly generated for each town, but they always fit. I am a paid member, so I can choose the town I want to start in. Once a town has 40 members, the invasions begin. At 5:00 p.m. EST every day, the site literally goes down while the zombies come. After 10 minutes of attack, players log in to see what happened and who survived. check out any one of my livestreams on the game to see it all in action.
Sanitorium is a pretty unique experience so far, but in most ways it's as common as basic human psychology.