I've tried to beat Zelda OOT like three times but I keep getting bored at different spots. Once when I was barely an hour in, once inside Jabu Jabu, and then of course at the dreaded Water Temple. I had the Gamecube version and I traded it in because it was worth a lot of money. On the off chance that I ever feel like playing it again it emulates pretty much perfectly.
Also, I tend to think anyone who argues that the PS3 is better than the 360 is absolutely ridiculous. But still, I'd like a PS3 for a Blu-Ray player, MGS4, and... well the fact that I can't think of a third reason kinda backs up my opinion on it.
In the vein of Nasenmann's post, I can't beat Ico.