Oh guys, let the Wii have this one ;)
After all, I have all those games (MK Wii???) and they are better than most PS360 games. Ratchet and Clank, Uncharted are on-par IMO, but still, it isn't Mario or Zelda.
That's why people have a Wii and... or just a Wii. I think everyone should play most, if not all, the mentioned games. I can't say that for the other consoles.
The Wii is essential due to its exclusives, and those niche games (okami, Xenoblade, Pandora's Tower, Bit.Trip, de Blob etc.). That's why they're the best exclusives IMO.