In once found an article on DPR about some composition lines in Henri Cartier Bresson’s images, some interesting diagonals included which are not part of the “rule of thirds” (my most favorite ignored rule). It was more about “the golden section” (sorry if this translation might be incorrect) which is not exactly thirds. I need to look up the link to the article and another I found afterwards. The I made a pattern of these lines and overlaid it on some of my images I like or rated higher than “the usual stuff”. It was very interesting how often that pattern was found in the image.