Splatoon is badass. Loved it on the wiiu, haven't got to touch it much on switch though due to internet. Breath of the Wild is pretty fun but not GOAT. Put a few hundreds hours into it though. If you enjoyed the exploration more than the dungeons you'll love BOTW. Diablos is pretty dang fun on the switch. There is an ongoing season currently. There's a ton of great indie game like Stardew Valley (even has the multiplayer patch,) Hollow Knight. Wargroove if you loved advanced wars. And on and on. Switch is definitely my favorite console ever.