Usually the analog stick. I’m just more used to it so it feels more natural most of the time. But some games do play better with a dpad, so there are exceptions.
I think the switch did pretty well actually and I get why they made the decisions they made. As much as I love my steam deck, the thing takes up like twice as much space as my switch, for example. There is definitely room for improvement though.
I think it’s because most people play mobile games as a way to pass time, rather than to do something actually engaging. So, people don’t typically want to buy mobile games upfront, meaning devs gotta monetize in some other way, like p2w microtransactions.