If Traverse Town were to be a lot like KH1 Traverse Town, that'd be awesome.
Mostly due in part to the few NPCs wandering around. I liked the atmosphere in which is felt that the Town was populated with characters that aren't Final Fantasy. Some random dude took over Cid's shop after awhile which felt a bit sweet like, wow, other people willing to help out!
Not to mention the place is pretty mysterious--like the Gizmo Shop and the town's many secret places. (Merlin's hideout, the bell rope at the tower, the Lady and the Tramp fountain, etc.)