Thanks for sharing this, I enjoyed it. The audio exercise was so simple, yet so cool I had to laugh out loud!
One music class I took discussed the subject pretty thoroughly, and what I retained from it more than anything was the suggestion not to fear repetition in writing and arranging, that repetition had good potential and importance, as long as the repetitive component was something good.
I was always keenly aware of the sense of "burning out" on a favorite song from overplay, yet I knew most people would play it again and again.... It seemed I was the only one searching "b-sides" and looking deeper into albums and going to the obscure back of the rack stuff in search of something new. While everyone else wanted to hear the same stuff again!
Also, the common response to a song I didn't care for because of a sense it was "too repetitious." Yet there it is, it draws us in somehow.
Just rambling thoughts. But again, good article, I enjoyed the writing and perspective!