I love the way that they gave every attraction a different style that seems somehow universal. From Zelda being made from chiefly yarn and such, Metroid looking like a classic Arcade game, the awesome tinny look of Pikmin, and the silly outfits in all the competitive games, I can't get over how glorious each rendition of some of Nintendo's staple franchises look. These games can get extremely tough, too. I'm talking, like, 80's retro tier difficulty, and I love it. Like Clamps, I only recently but DKCC, but I had the happy accident of flipping off the top tier above Rosaline and landing on top of the flag to win. I still have no idea how to get on to the second to last platform. Despite being the only game I own for it, Nintendo Land has kept me effectively glued to my Wii U since I got it 2 weeks ago.
EDIT: @Hydrohs, you got that right. The games had my friends and me literally screaming at each other at the end of every match, and I loved every moment of it.