I agree its a good idea to keep the rules to whats really important.Too long a list is a detriment to their welcome, in my view.
However, to me, my rules are very important.
Please park in driveway, even if behind another car, rather than park in road or at my neighbors home.
Solo travelers only( in my home room rental this eliminates a lot of stress and drama)
Carefully close door every time to ensure not to let cat out.
No shoes in home.
Please listen to music with headphones at night and make any calls from living room as to not disturb anyone else( me, mostly).
Meat free kitchen( once i had someone bring meat and want to keep it in her room instead!)
I also verify they have read and are ok with all rules and my check in/check out times BEFORE accepting the booking… this also eliminates a lot of problems and identifies any problems before they occur.
you may get a response like, oh im allergic to cats… oh i planned to arrive at 3 am, oh i need to make pepperoni pizza… and you can just nip those in the bud as no booking has been made yet.