My other addictions include a lot of drawing, music, a fair bit of painting, and a hideous amount of writing, both in screenplay, essay and novel form. I can see the links music and visual arts have to cinematography, but I also think that essays, not of the sort that are written for school, have a lot to do with cinematography.
Maybe I've taken it too far, and I'm just a lowly student trying out things that are new to me, but I like to take my background in English and writing and apply that to composition of a shot. In English classes, I would often have to break down a sentence into its individual words and evaluate the sentence; I've grown to believe that same thing can be done with images. You have to identify the subject, the direct object, the indirect object, etc. in the shot, as well as recognize what might be adjectives (beyond simply showing what the subject matter looks like), adverbs, articles, etc., and construct these like a large visual sentence. In writing, there are a variety of different voices that one can write in, and just as I don't like to write in a passive voice unless absolutely needed, I like to try to figure out what the grammar of a composition is, and make sure that what I choose to capture is in the right voice for what I am doing. Whether or not a visual grammatical approach a good idea, at least it makes me think about what I'm doing.
If you think that's pretentious, I can do a lot worse.
Sorry, I strayed away from the original topic a bit.