Familarity Breeds Comfort
See this, which puts me in mind of another study I read several years ago (for which I have no reference, sadly).
It found that exposing people to certain songs over and over again would cause them to prefer them, even if they didn’t like them originally. It seems that aesthetic preferences ultimately aren’t as important as avoiding the sensation we experience when we’re accustomed to something which is no longer present.
This is part of why radio stations that play popular music often showcase the same few songs over and over. They want people to get used to them so that they’ll like them.