The Wikipedia chart shows the top nintendo switch games of 2017 in order.
The Legend of Zelda: Breath of the Wild sold 4.70 million copies
Mario Kart 8 Deluxe sold 4.42 Million copies
Splatoon 2 sold 3.61 Million copies
Super mario Odyssey sold 2 Million copies
1-2-Switch sold 1.37 million copies
Arms sold 1.35 Million Copies
Breath of the wild is obviously the most popular game from 2017 that being said i still enjoy them all each game has it own feel which makes them all unique.
let me know your favorite switch game from 2017!