I'm not very interested in music compared to the average person. But I'm curious about changing tastes in music over time, because it's part of our cultural fabric. Since I lack real "thick" knowledge in this domain, I started to think of crutches to allow me to get a slice of perception as a function of time. So what I did was look at all the top songs by year since 1970, and found them on YouTube. I created a "playlist" which I could listen to all at once.