im just going to go ahead and describe the games i've played on the switch so far, if you want an idea of what kind of games there are:
botw - really great open world zelda game that breaks from typical zelda tradition and tries a bunch of new stuff that works out really well. also available on wii u, but the switch version is superior due to portability and performance.
mario kart 8 deluxe - pretty much an improved version of mario kart 8 on the wii u, as the name implies. all the dlc from mk8 is included. features new characters (ex. inklings), a totally revamped battle mode that actually doesn't suck, as well as other changes to the gameplay throughout.
arms - really fun fighting game where you're a character with extendable arms that goes around a ring extending them out to attack. features multiple modes, like your typical fighting modes, a hedlok mode where you must work with the other players to defeat a powerful ai-controlled guy, and little games like v-ball and hoops.
splatoon 2 - oh boy, let me tell you, this is probably my favorite of them all. i have a forum thread in the games section if you want to read more into it. it takes the original splatoon, a great game on the wii u, and makes it better in every way. complete graphical and scenery overhauls, new stages, new music, new gear, more customization for your inkling, a new salmon run horde mode, a new hero storyline, etc etc etc.
super mario odyssey - absolutely great to play mario platformer. it's real fun, just exploring all new worlds and going around with your magical cap to possess capture creatures so you can do things. tons of things to collect, and tons of things to do in the kingdoms.
