I use my steam deck to play otome games and visual novels ,it's more comfortable for my back to lay in bed than sitting on my chair. I use my pc and ps5 for other video games.
I definitely prefer playing on portable devices like the Switch, even though the screen can feel a bit small sometimes. My workaround is streaming my PC games to my tablet! That way, I still get the portability, and the screen size is just right.
I love to play on a PC, but unfortunately, I mostly play while commuting and outside the home. Even a regular switch is awkward to hold there, so I read on a switch lite
It's not a preference, it's simply the only possible option for me