1. Yes, there is much interesting philosophical work on modern art. I would start with Arthur Danto, who has written many interesting essays (often for the Nation ) and a few fascinating books on the topic. 2. The term aesthetics i s certainly applied to music -- see Theodor Adorno and currently Lydia Goehr and Peter Kivy for example -- as well as to poetry. Less frequently to literature, but this is presumably because there aesthetic quality is typically a less important component of overall quality (esp. outside fiction). 3. "Logic" is perhaps not quite the right word for what you have in mind here. Perhaps "rules"? I would think that aesthetic judgments are intuitive judgments, and that any rules laid down for composition or appreciation have standing only insofar as they are confirmed by intuitive judgments. (Intuitive judgments may differ, as they did in respect to the atonal works of Arnold Schönberg, for instance, and judgments about rules will then differ correspondingly.) To...

Reading your "should" as alluding to what you owe the rest of us, I think there is no obligation either way. Perhaps some utilitarians would hold that you have a duty to maximize the general happiness, even by turning heads and upgrading others' visual fields. But such an assertion is more plausibly taken as a reductio ad absurdum of these brands of utilitarianism than as informative about your obligations. Reading your "should" as alluding to what it makes most sense for you to do, the answer depends in part on your ends and ambitions. Dressing up, you'll have a lot of silly boys and guys chasing you, which can become tedious rather quickly. Still, some of these will have money, power, connections -- and you may feel in need for one or more of these. Continuing your current practice will make you less discouraging to people who are interesting, and interested in you, in other ways; and it will also give you more time to interact with them. This is likely to make your life better, richer, than...