What I believe
“You don't get an instruction manual with an iPhone.”
That's something my old UX manager at NTT DATA used to say, and it's stuck with me. Use common patterns, put things where people expect them to be, and if you can find a moment of joy along the way, even better.
A recent favourite: on the Octopus Energy app, pressing a button on the submit meter reading page turned on my phone's torch. I'm guessing it's there to help people read meters in dark places, and it's exactly the kind of small, thoughtful detail I love.