Have yet to buy a switch 2. If they release a lite version it will probably be the model I buy. So if/when I have one it will be 100% handheld.

When the switch was new I played it 50/50 docked and handheld, but for the last couple of years i have only used it in handheld. Even if i think the OLED model is too heavy for a comfortable portable experience the dock is only another charger.

Mostly docked. Probably 80/20 split for me, outside of holidays at least. But I did take it with me on our three week trip to Africa last year and I expect portable usage to increase over time. So far, my most played game is Mario Kart, which is obviously perfect for couch multiplayer; and I'm currently playing Resident Evil 9 which was tailor made for docked mode. Stuff like Animal Crossing, Splatoon, Pokémon lends itself more to portable play I think.

Edit: I really think Nintendo should consider releasing a "Switch 2 docked" version that's more powerful than the portable version and relatively cheap to buy. And a Switch 2 Lite, as well. Give people options.