DC: I had a revelatory moment as a child when I was drawing Superman. He had that insignia on his chest, and I was studying it for hours (I think I was 4 or 5). I saw the negative shapes that define the S, but I didn't get that it was a letter. I would draw those shapes over and over. Then one day I realized, "It's an S!" It all fit together. "S for Superman, of course!"
Quick survey, anyone?
(The above is from ReadyMadeMag's Dan Clowes interview by the way)