Id say my least favourite part of my workflow right now is the selenium automation I have to run locally for dev testing.
The stuff I have to run for my current story takes about an hour to reach the point I am interested in. Then if it throws an exception or doesnt work properly, I have to make my fix and run it all again.
And theres not much else I can do while its running either, if I make any other code changes Gradle will recompile everything. So I basically have to sit and watch it, or go watch a clean coders video in another window while it runs.