The best looking game of all time?

[TWRoO]

I agree with Windwaker.
Okami, Lost Winds and World of Goo take some runner up spots though.

Games I have not played but admired from screens/video I have seen:

Prince of Persia (X360/PS3)
Mirror's Edge (X360/PS3)
Patapon (PSP)
LocoRoco (PSP+PSN I think)
Flower (PSN)