One thing to keep in mind that drives me insane is that the default animation speed on android, 1x, is very slow. It makes the UI feel heavy. Turning this to .5x, or even off, makes it feel more performant.
For those who don't know, enable Developer Options, then change "Window animation scale", "Transition animation scale" and "Animator duration scale" all to "0.5x". It should really be the default and I'm surprised there isn't a "0.25x" as of yet.