Ugh dude, I feel it. I remember back in Halo 3 when I would literally all day just search my recently-played-with list for people in joinable custom games lobbies. And that was normal! 16 random would play Fat Man or Duck Hunt and it was something a lot of people did. I didn't get that same experience out of Reach, and I think that's mostly because XBL parties were invented, detaching people from in-game comms.