I, too, like to listen to the same songs over and over again, sometimes just one song the whole day. Sometimes it's just on the background to make me feel good, sometimes I listen to it in different ways, for example, I pick an instrument or a part in a harmony and follow only that, sometimes I add new melodies or rhythms into it and listen how they "sound" together (I'm not actually making the sounds but imagining them in my head), or sometimes I remove a part in my head and "listen" to the song without it, sometimes I listen to the combination tones of the harmonies, or other stuff that hear but I don't know how to explain in English. Switching focus makes it sound like a slightly different song, because the balance changes every time you switch focus.

There are so many things to hear in a song, how could anyone be satisfied to listen to a good song only once?

Also most songs have something really wrong with them (like the singer's voice has some high frequencies in it that constantly keep slapping your face, or there's the annoying metallic sound of autotune that most current music has, or anything out of tune is stressful, etc), so I really dislike listening to the radio or anything where I can't control what I listen to.