1. LEGO Batman: The Videogame
One of the two games that came free with my Xbox Elite. At a different time this game may been played, but since I upgraded on the heels of Bioshock 2, Mass Effect 2, and my switch from Gamefly to Blockbuster's rental service this disc hasn't seen the light of day.
Re: Lego Batman
3. The Orange Box
Full disclosure, I've played all these games on the PC, but I picked it up for the 360 just to see how it differed. I guess I wasn't that curious.
4. Halo 3
When I first discovered Swaptree I was a fan. It gave me a chance to check out some older games I wasn't too interested in buying straight up, and the cost of an old game of mine and shipping suited me fine. But again this was post holiday season 2009 which was loaded with some great, time consuming titles.
5. Animal Crossing: City Folk
My wife and I are both big fans of the Animal Crossing title for the DS, but our apathy towards the Wii in general easily overpowers any interest I have in the game.