For the people talking about Mario Galaxy 1 & 2, personally, I liked the first one better simply because it had a bigger WOW factor and new and innovative motion controls.
Sure, Galaxy 2 might have been more polished, but it did not reach the wonder and mystery the original game did. Think of it as LBP 1 vs. LBP2.
(And for the record, I voted for Zelda: Twilight Princess)