The 3DS is my favorite handheld of all time, and if I'm so bold it's probably my favorite system of all time too. Here's a list of games that I think are worthy of being deemed 'great' (remakes not included):
I still have yet to play a few 3DS games I've been meaning to get, so I might add to this list in the future. ^^
- Animal Crossing: New Leaf
- Super Smash Bros. 4
- Kid Icarus: Uprising
- Rune Factory 4
- Dead or Alive: Dimensions
- The Legend of Zelda: A Link Between Worlds