Editorial Anonymous is a blog written by a children's book editor (I was tipped off to it by Brian Campbell). This is from a post about what to say in cover letters:
"Showing me that you are aware of the ingredients of a good manuscript rather than simply your reaction to it sets you apart."
That seems to me to nicely capture an important distinction: between one's understanding of how a work of art works and one's response to the work.
To this day, I cannot stand the movie Blue Velvet. But at least I confronted it once (in a class on American films) and now understand both what makes it so powerful and what makes it so disturbing.
Editorial Anonymous continues with a lovely metaphor:
"You know, most people enjoy any cake that is pretty and palatable, and that's about all they can say about it. Other bakers, though, can tell that this one has a good crumb and a touch of nutmeg and that the type of icing is a good match for the texture and sugar content of the cake."