1. First-Party Studios
Naughty Dog. Sucker Punch. Bend. Guerrilla. Cambridge. Polyphony. Japan. London. San Diego. Media Molecule. Evolution. Santa Monica. Sony has the most diverse 1st party studios in the industry right now, and these are studios that are not afraid to try new things. The multiplayer modes in God of War: Ascension and The Last of Us were things that other studios would just never try because they would obviously never have mass appeal but are still fun and unique. I would hate to have to miss what these guys cook up next.
Adam Boyes. Seth Killian. Shuhei Yoshida. Mark Cerny. These are guys that ooze passion, and are all working exclusively at Sony. There are other guys at Sony too, but these guys really stick out to me the most as people that genuinely enjoy videogames. Nintendo has some duders that seem genuinely passionate as well, but Microsoft? I haven't seen it.
3. Jack Tretton
He's a boss.