100% my favorite part of every KH game is the Winnie the Pooh SQ/storyline. Such a nostalgic and fun way to spend a couple hours away from the whole saving the world aspect. So ya the 100 acre wood. But to go game by game and not include 100 acre wood...

KH1: Halloweentown

KH2: The World that Never Was. This was a great ending world. Just plain epic. And exciting too if you got all 101 dalmatians in the first game and got to view the secret ending.

(Not including 358/2 or CoM because their just replication worlds)

BBS: I've got to go with the Dwarf Woods from Snow White. I just liked to see a new/classic world like that. Enchanted Dominion was nice too.

Can't wait to play Dream Drop Distance. My 3DS just came in the mail!!!