I just started playing "Gears of War" for Xbox 360.  RULES!!!  If you like Halo-type 1st person shooters, you'll like it.  The health thing is nice for one.  When you start to get weak, just pull out of the battle for a few seconds, and you're good.  You spend a good portion of the fighting with partners, so that rules.  And you can play split-scree cooperative for those of us nerds who actually have real friends to play with.