I shutdown my Desktop daily, sometimes more if for example I'm playing in the morning and going out for lunch and coming back in the evening and playing again. In short if I'm going to spend over an hour not using it I'll power it off, no reason to keep it on and honestly it powers on almost as fast as coming back from hibernation so why bother? That made sense before SSDs, but nowadays I don't see much reason.

There's one big exception, and that is sleeping in the middle of a game, to be able to be back in the game in seconds. It's one of my favorite features of the Steam Deck, but I haven't tried it on my desktop because I usually use it for other stuff too so it's not as useful there.