PC mainly, but a couple months ago I got a Steamdeck, and I can now play from the couch on the TV.
I’ve wanted to be able to play from the couch for a long time, but I did not want a PC on the TV, so this is a very good option.
I can play casually and also play coop sometimes easily.
Most importantly, I don’t have to be in my “office” room, since I work from home, it is good to be away from the room I am all day working on.
Subnautica.
I played it when it was beta, could not finish it then.
It runs pretty good on the Deck, and I alternatively play it on the Deck docked to a tv on the living room, and on my PC.