Xenoblade Chronicles 2 - I didn't play the original on the Wii and was surprised by the announcement of the sequel. Bought it day one and loved it! X3 isn't quite in the same level I think. I really enjoyed the humor and the over-the-top character designs. Of course, the world design is amazing. It was a really cool "boy meets girl" story at its heart.
Pikmin 4 - almost had given up hope on a sequel. My wife and I love playing Pikmin together, and Pikmin 4 delivered on all fronts.
Breath of the Wild - I had my doubts when the game was revealed, due to the series straying further and further from its roots in the years prior. But BotW blew me away. I played it for months straight and enjoyed every minute of it.