Why on earth would you not want to play the best games available for the system..? Did Nintendo kill your family and rape your dog or something lol
Okay, here you go:
Bravely Default (85)
Code Of Princess (67)
Etrian Odyssey Untold: The Millennium Girl (80)
Etrian Odyssey IV: Legends of the Titan (84)
Dead Or Alive Dimensions (79)
Ghost Recon: Shadow Wars (77)
Harvest Moon 3D: A New Beginning (74)
Heroes Of Ruin (69)
Kingdom Hearts 3D: Dream Drop Distance (75)
Monster Hunter 3 Ultimate (Yes, Nintendo did publish it in some regions but it's always been known as a Capcom flagship title) (79)
Persona Q: Shadow of the Labyrinth (84)
Project X Zone (70)
Resident Evil Mercenaries (65)
Ridge Racer 3D (75)
Rune Factory 4 (78)
Shin Megami Tensei IV (84)
Sinobi 3D (69)
Tetris Axis (74)
Theatrhythm Final Fantasy (78)
Theatrhythm Final Fantasy: Curtain Call (83)
I've included a few there that are also available on iOS but why pay for a game on your iPhone (assuming you have one in the first place) without proper controls when you can download them on your PC and play them on your 3DS for the price of a Gateway flashcart..? And once you include Nintendo's efforts and the eShop games (which you can also download for free to your PC and install them onto your 3DS) it's worth getting.
There's also the Homebrew Scene which has just started finding its feet. Doom (and I hope Quake soon!) has started being worked on and is playable but buggy and someone has started work on a Homebrew media player that, unlike the one Nintendo have given you, isn't crippled by a 10 minute video length restriction. Going to be great if you have long train or coach journies to sit through.