[W]hatever version you have access to, I can't recommend Shovel Knight any higher.
[T]his is a wonderful game that I obviously can't stop playing, and I can't speak highly enough of. Endlessly charming and unusually engaging, Tomodachi Life is a fantastic diversion.
Swords & Soldiers isn't especially long, containing three campaigns with 10 missions apiece, but you can go into Skirmish mode for practice sessions and unlock some interesting mini-games. There's even an interesting two-player mode in which one player uses the GamePad and another play uses the TV and a Wii Remote, which is fantastic.
ASM2 is still a good game at its core, with some improvements over the original, but they really botched the Hero/Menace element.
Batman: Arkham Origins: Blackgate Deluxe Edition is both fun and frustrating—exactly the kind of game I don't like reviewing. If you can focus on the parts that work (exploration, collectibles) and downplay the stuff that doesn't (the map, the combat), you'll have a good time. I can't recommend this to people who already played it on Vita or 3DS, though—unless you really loved it, it's probably not worth the double-dip.
I like Edge a lot. It's addictive and elegant in its simplicity, and the geometric world is bizarrely engaging.