The bathroom light has been the most contentious automation item in my household. I like to have a light come on in the bathroom at night to about 10%. My partner does not want any light whatsoever when she enters the bathroom at 2:00 am. I use a combination of modes and turn light on motion. In the end I manged to get a simple night light in a socket in our bathroom. Sometimes the dumb solution is the best solution.
There was another discussion for using contact sensors and a motion to automate the bathroom light a while back.