Weird I loved nintendo land literally it's the only game everyone I know wants to play other than Mario Kart.

Pikmin is the worst I've played so far but it is SO much better since they added touch controls.

I have to go to with Game & Wario! It was more boring than the Argentina-Bosnia match!

New Super Mario Bros U, is fun but it feels like more of the same, also it came very close to NSMB2 and I had just played NSMBWii

I've not played any really bad ones but I suppose nes remix 2 though an improvement on the first didn't seem as fresh so I played it far less.
Out of the retail ones I've played I'd say Nintendo Land. It's an reasonable minigame collection that I put a fair number of hours in with my niece and it's clear they put a lot of time into making it. It's nothing great though.

I enjoyed all the 1st party games but for me Pikmin 3 was the worst because I had had higher expectations before I was able to play it. Nethertheless it is a really great game.

Pokemon Rumble U?

Out of the ones I've played, this is my order:
1. Wind Waker
2. 3D World
3. NSMBU
4. Nintendo Land

I really need to get more!