Voted Other because I want to give some love to Torna the Golden Country. Really excellent as both an expansion and stand alone game.
But Ultimate is right up there, best Smash yet imo. Octopath Traveler was great too. Also had some great multiplayer fun with Dragon Ball Fighterz, Mario Tennis Aces, and Super Mario Party.
Kirby was really good but haven't yet checked out the addon content.