Tropical Freeze is an absolute classic and will always remain one of my favourite games. Every level is so distinct, the soundtrack has so many amazing songs, it's all incredibly memorable and endlessly replayable. Whenever I boot it up again, after having played through it 8, 9, 10, 11, god knows how many times, I think "by this point it's probably gotten old, right?" and it never does.
I've moved on from every other Donkey Kong game shortly after finishing them, but never Tropical Freeze.
edit: All that said, I wish the bonus stages were better. Them being generic bore-fests is what keeps the game from being perfect.
edit²: as a disclaimer, the only DK games I've played fully through were DKC2, DKC3, Returns and TF. I never made it through all of DKC1 as I found it too difficult, and only played a bit of Bananza which I didn't personally enjoy much. Never played DK64 or the GameCube entries.