Supergiant Games: Bastion, Transistor, Pyre and Hades.

I've had an absolute blast with My Time At Sandrock. Didn't play My Time At Portia, so I went in with 0 knowledge and 0 expectations, and it's been so much fun. Quite cozy and casual, but with such a great gameplay loop, diverse mechanics and minigames, and an unexpectedly super fun story and characters. I've been told I'm only in Act 2, and I'm nearing 200 hours.

Oops, sorry for the late response. I'm playing it on PC, and haven't had any issues with load times. No idea about Switch, I'm afraid.