Speaking as someone who wasn't personally impressed with this generation as a whole...I guess the Wii for me (we're not talking about this objectively, but I guess the Wii won with sales and expanding the market anyway).
But I don't regard that as much of an accomplishment. PC is a close second determined solely by personal preference. I just like the Wii Games more.
I can appreciate the simplicity, but the 360 and PS3 truly are 'limited PC's' in a lot of ways. The Wii ruled in terms of high-quality exclusive games you couldn't play elsewhere. I acknowledge most people never gave half of the unique titles on Wii a chance (No More Heroes 1+2, Epic Mickey, Radiant Dawn, etc.), but I don't think that discredits them. Certainly didn't effect my enjoyment of them.
Also, never been a fan of online gaming on consoles. Much less sociable and less community driven. And I hate DRM and all the Installation crap involved in the the other 2 consoles, and then there is the RROD. Yes, I know it's a stale punchline but it really is pretty shameless how high the fail rate got.
I guess I just wanted a console that let me play several good games with no hassle or constant breakdown. Wii provided that for dirt-cheap. And besides Lost Odyssey, no other console exclusive came out this whole gen that interested me. Some of the PS2 exclusives looked fine, but nothing that made me really desperate to try. I was perfectly content with Steam and Nintendo for the whole duration.
It's odd. I was a 'Sony Kid' in the nineties. Now I look at them, wondering why they're still here when all other platforms have kicked them to the curb.