Rayman Legends. Still this day I play the online daily and weekly challenges every day. Almost at 10 million Lums so far.

DK: Tropical Freeze takes it for me. I love the challenge, each time I hear that death jingle I just have to try again. @_@

Runner up would be Shantae or Guacamelee. Unless those don't count for some reason.

Good point! 

Mario 3D World, followed by DKC: TF and Rayman.

"DKC: Tropical Freeze" is my personal fave. Nearly a perfect 10. 

When I had a Wii U, I only played DKC Tropical Freeze and Mario 3D World. I enjoyed Mario 3D World more.

I freaking loved Sonic Lost World! I consider Lego City Undercover a platformer. One of the very best! Rayman legends turned me off at first but I got so sucked in that I completed 100%!

3D World of course. Any 3d Mario beats virtually any other platformer in existence in my book.

For me it's DK. It was fun going through the game for the first time but the real fun started when I went back and tried to get all the collectables and lock up all the extra stages. Then after 100%ing it I didn't feel done yet and started to 200% it. I managed to do so and turns out I had even more fun doing this!

In addition to that I played through the game in co-op which also was a lot of fun. :)

Tropical freeze hands down!