Whichever platform gets an exclusive Silent Hill/Resident Evil/Numbered Final Fantasy. Mario and Zelda are enjoyable as well, but not games I desperately need anymore. The Wii and my PC tend to get games in the genres that I like. PS3 and Xbox gets many games I like as well, but most games released on one of those consoles are also released on the other, so no need for both.

I ended up with Wii/PS3 and it's been a winning combo for me the last years, there are hardly any games I want that I can't play.