Follow up to Beautiful Things
You can see something physical at the heart of aesthetic judgements
yes, matter, the constituents of pigments, words, notes, et al.
natural properties like symmetry, balance, and economy of effort. So there are objective properties that appeal.
These are properties of form, not matter.
I agree that surprise has a lot to do with it, but we still have a very Platonic/Greek, the classical conception of beauty. This classical conception is changing. The history of art in the 20th Century suggests that artists were reassessing what it meant to be beautiful. The surprising works of Du Champ, Kandinsky, Picasso, Pollock and others have begun to change that conception. The problem with the classical conception of beauty (I think) lies is its connection to a conception of the divine which became prevalent during the Renaissance and has remained so.
Look at Lucian Freud's
works. Many of his works are hyper-realistic. It was not unusual for him to spend 1500 hours on a portrait. They are not beautiful in any classical sense, but they are beautiful. He managed to use hyper-realism to transcend what is simply realistic. The beauty and the truth of his work startles you, its aesthetic affect as it transcends our normal sense of what is real.
Or look a Pollock's splatter paintings...matter is here overtly presented with the artist allowing form to arise from the juncture of the pigments on the surface of the canvas, and not by any thought of fractals or symmetry. Kandinsky takes subjective feelings and presents them corporeally. Even Picasso's who changed styles multiple times, can hardly be said to have followed a classical notion of beauty for many of his works.
I think similar notions hold true in music, such as the a-tonality of Schoenberg, the sounds & lack of sounds of John Cage and others.