Noki Bay was my most favorite level. Nice music, very nice colors, and just fun.
Also, I REALLY DON'T UNDERSTAND why people hate Bowser Jr. so much. So what if Bowser already had children? It's not like he couldn't have any more children after seven koopalings. Jr.'s probably much smarter than the rest of the koopalings (well, maybe not Ludwig) if he could successfully frame Mario and kidnap Peach right from under his nose. All the koopalings did was try to keep Mario from advancing.
Meh, your opinions, I can't change them.