The town design benefits from it in Bravely Default. But its not really a huge deal in any game. It just looks really nice in Bravely Default, because when you enter a town, its like a parallax layered thing. It looks like a layered painting. It's really pretty. And adding depth makes it really really pretty

I would suggest that game just because it deserves some love. I dunno what kinda games you're into. For DS people are going to suggest The World Ends With You since you already have Radiant Historia

The Devil Summoner games are probably pretty good. I own one but haven't really dug my teeth into it yet. And I have the second one pre-ordered lol

But my favorite games are Fire Emblem: Awakening, 999, Tales of Innocence (you'd need a ROM cart to enjoy that though), and Tomodachi is an insanely amusing time waster. I also have Fantasy Life and people rave about that. The girlfriend has The Four Heroes of Light, and Rune Factory 4, which are pretty highly regarded