I've been playing less and less matchmaking on XBL lately, and more custom games. Some of them are pretty creative, like Zombies, and Paintball. I think my favorite is No-scope sniping.
My question for you guys is: What is your favorite custom gametype? Be as specific as possible; like what weapons are there, sheild options, cloaking options, vehicles, all that stuff. Hopefully I can get some good ideas from you, 'cause it gets boring playing the same games all the time.