I have 3 levels/layers of listening. The first level is just exploring and getting a sense of a style or a particular composer. The 2nd level is I get into period of delving more of a certain period/style. The 3rd level is listening or relistening to music I have good familiarity with already and that I like a lot. I usually have a certain mix of the 3. I found that in appreciating what I don't like, makes me appreciate what I like even more.