My friends hate me for this habit. I will listen to a song on repeat for months, but by day 2, people are begging me to play something else.
Its just a nice constant. I know what's coming next, I know how it makes me feel, it is predictable and safe and reliable. Its one thing that I can really really control and oversee and predict accurately.
Probably why I also end up watching the same shows, movies, etc.