@Felthry Good 3DS games?
Wario Ware Gold. Whether you've ever tried the Wario Ware series or not, this is the one to look into.
Fantasy Life. It's a very cute RPG with a life sim aspect. You can be a warrior or a magician, or you can just be a cook or a tree cutter. Combat is 100% optional.
Miitopia. Another RPG, this one lets you use Miis to create all of the characters in the game, from heroes to villains to NPCs. Has a really cool relationship system.
@Felthry Mostly DS? I can help you with that.
Retro Game Challenge -- This is a very weird and charming game. You're sent back in time and forced to become a child living through video game culture of the 80s. It includes new games in a retro style and snippets of video game magazines to really give you this weird feeling of immersion in its world.
@Felthry
Ghost Trick -- It's a murder mystery, and you play as a time-travelling ghost who can possess and manipulate inanimate objects, and you basically use your powers to undo murders while trying to solve the mystery of your own death.
@Felthry There are three Ace Attorney games and four Professor Layton games on DS, and I think all of them are worthwhile.
@Felthry Wario Ware DIY -- Your mileage may vary, especially now that there's no online community to back it up, but I found this to be a really interesting game-making toy. Very simple but surprisingly powerful.