Why do people have favorite numbers?
There have been several questions asking favorite numbers, but no questions have asked why favorite numbers exist in the first place.
People use their favorite colors when painting rooms or buying clothing, along with other things. People order food based on their taste preferences. People don’t seem to do much with number preferences.
So, why do people have favorite numbers? When are they useful, if ever?
This question is in the General Section. Responses must be helpful and on-topic.