Do you like to hear the rotor in an automatic watch when you shake the watch close to your ear? I actually like that whizzing sound and appreciate the subtle differences there are. I saw a guy once who could tell the car make and model by the sound of the door closing. I wonder if people can do that for watches.
When I hear the rotor it reminds me of the mechanical nature of the watch and of how it interacts with me.
What I also would like is not hearing the rotor but seeing it swirl through a display back. But I haven't had that pleasure. Those watches I have that have a display back you can also hear the rotor. And those where you can't hear it, have a solid back.
So what's your preference?