To me it shouldn’t matter, but it feels weird having the bathroom door open all the time. Also my shower sometimes does a midnight clunk for no obvious reason and it’s loud.
I never really thought about it until now, since I’ve never lived in a “master bedroom” with attached bathroom until now. Still on the fence, leaning towards keeping it open for convenience and airflow/dehumidification more than anything. Obviously I shut it after things get smelly.
Open. In fact I could remove the door. My bathroom doesn’t stink and if anything is making noise in there then it needs maintenance anyway.
That being said, the doorknob has become a home for trash and recycling bags for the bedroom, so I guess that’s handy.