re: What are some other great 3DS games besides Link Between Worlds?

I've only played a handful of games, but all of them have been absolutely worth keeping the system. Luigi's Mansion: Dark Moon is surprisingly fantastic. Mario 3D Land is a good time waster. Obviously the OOT and MM remakes are safe. I've also played some old DS games my brother had, and got a few titles for the Virtual Console.

If none of these sound appealing, then don't forget about Smash Bros. At first I thought the 3DS controls would be weird, but honestly, I prefer them to everything but Gamecube controller now. Bottom line, it is a great system and there is plenty of fun you'd miss out on if you dumped it off.

Edit: I also got mine to play Between Worlds, and have expanded since then.