VegetaCreeper
Mine is definitely Zelda Breath of the Wild.  It's so fun - and actually difficult.  It has some great puzzles to solve. 
 
+ playing it on the switch and having so many ways to play it makes it BEYOND fun.  I like using the pro controller and using the Joycons (alone) in each hand.  It gives the game a totally different and fun feel.
 
Of course the graphics aren't anything to write home about, but the game has vivid colors that look amazing!!! 
 
SO FUN