On one level, I would say that I've never written an original note. After all, there are only 12 tones, and it's all been done before. Everything I have written has been at the inspiration from somebody else's music. I feel no shame, because "borrowing" from others is a time-honored tradition, even among the masters.
I did have one eerie experience. I began wanting to emulate some of the British masters. chiefly Ralph Vaughn Williams, with maybe a bit of Holst or Bliss thrown in. At this point, I was unfamiliar with VW's Pastoral Symphony (at least so far as I knew). To my horror, I discovered that my primary motif was identical to the opening parallel triad in the Symphony. Could this have been the re-emergence of a forgotten memory, or just a complete coincidence?