This was a King's Indian, which is probably the opening I know the best of my d4/c4 repertoire. (The other one that I see a lot of is the QGA, so I'm very comfortable there as well.) He played the opening quite poorly, and I have a completely won game on move 14.
Of course, I blew it. Multiple times.
Not much to say about this one, it's definitely the worst of the four that I played. Black's moves weren't any great shakes, either, but good enough to win.