I'm totally addicted to Borderlands on 360. I put down COD MW2 after Christmas and have been playing Borderlands since. I completed the main story and also downloaded the 3 expansions. I've got a Lv 61 Soldier class right now.
I like that its more cooperative instead of a PvP type game when you play online.
I'm SManZ350 on XBL if anyone wants to get together for a run!