I also noticed this with books. My impression is that the same book can be called "great" by one person and "boring" or "uninteresting" by another, and it says

I also noticed this with books. My impression is that the same book can be called "great" by one person and "boring" or "uninteresting" by another, and it says really more about those people in relation to the book at that point in their lives, than about the book itself. It can show you what developmental stage these people are in. For some, reading a simple book on emotions will be a game changer, while for others it will be stating the obvious and they won't even read more than a chapter or two, deciding that the book was too basic or even "bad". I've developed a habit of buying and beginning a lot of books, but many I discard or set aside for the future. Few books seem "too basic" for me, with many I sense that their time is yet to come, or their utility at this point in my life is unclear. BTW I have the same experience with movies; some of them have a great number of really interesting detail that I often miss the first time around.