That's another thing with not only optional matchmaking, but the lobby system I mentioned for raids and crucible (not sure which thread we're in atm). With optional matchmaking you can ease your way into the group. You don't have to go in "hey what's up everyone, I'm yadda yadda". It affords you the opportunity to listen and get a feel for the group and deciding how and where to fit in if you want. Like I've said before, in Gears there would be people who wouldn't say a word, but after the 4th, 5th, 6th game together, they'd be talking up a storm.