I agree with your sentiment about ranking -- the gamification of art is pointless -- but I'd go even further: often you won't agree with yourself from the past about a book or movie! Sometimes you just need to be in the mood for a work you previously considered average to really hit you. Other times you revisit music that felt really powerful in your youth, but hearing it again only evokes a mild nostalgia and a feeling of "why did I ever like this?".