I have been reading this chain and a philosophical discussion on aesthetics (what is beauty, are there defendable or identifiable musical values that are recognized by everyone? or is there nothing and so anything is good if I say it is good, etc.) of some length would be needed to sort this out. When I was in art school many years ago I remember reading the "Art of Zen and Motorcycle Maintenance", "What is a Masterpiece" and other such books in an attempt to understand my judgement of what is good, what has value, and WHY. An important book in my pursuit of understanding musical values is Aaron Copeland's book "How to Listen to Music". My personal views are that, while I may enjoy for sentimental or emotional reasons listening to some music with immature or poor musical values (such as old Yes or Deep Purple or whatever you want to put in here)I would maintain if you are really passionate about music and interested in GROWING then you will seek out, experiment, try to understand and educate yourself on more advanced ideas about music and ultimately be more satisfied with the aesthetic experience.