Gameplay.

I'm obsessed with Halo 3 right now, and have been for months, and I'm sure those of you who have had the misfortune to come into contact with me during those months are more than well aware of that! I don't know what the smurf the story is other than there's some angry aliens or something. I skip all the cutscenes because after watching a few seconds of them they just bore the hell out of me. Hell, I don't even play campaign anymore. The sheer perfection of its multiplayer is just the ultimate in gaming brilliance.