A large part of it is certainly my personal preferences. And even if Material were itself good, completely disregarding the UI pattern the rest of the phone fol

A large part of it is certainly my personal preferences. And even if Material were itself good, completely disregarding the UI pattern the rest of the phone follows in your apps to implement your own is still going to be jarring. But I always come back to Material's "Up" button when asked for an example: https://material.io/guidelines/patterns/navigation.html#navigation-up-back-buttons https://material.io/guidelines/patterns/navigation.html#navi...