Surprised to say this since I thought the Xbox was pretty worthless (not a big WRPG fan), but... the 360.
It has more of that arcade action I crave. It has a bigger focus on social gaming (which is what consoles excel at). Its top exclusives, for example, Gears / Halo always have split screen modes, and won't sacrifice it for graphics. That's something I can really appreciate.
The PS3 seems to focus more on cinematic experiences, and while I'm mostly fine with that when they're Japanese developed games (for whatever reason), there aren't enough this gen that interest me. I guess the handhelds stole too much of Japan's attention?
Well, the HD consoles are close to equal for retail games, but XBLA really tips it in its favor. In particular, Castle Crashers is pure awesome, and I'm really looking forward to Battle Block Theater. These games are like system seller quality for me, as hardly anyone makes stuff like this anymore. Good local multiplayer games are hard to come across, even on the Wii (though most of them are on there, a major reason Nintendo is my favorite), so my vote has to go to the 360.
