On the subject of flipping, if I take a picture with some human action across the frame, it generally looks correct with more space on the right. As I live in the Western Hemisphere, I take it this is influenced by the fact that I read text left to right? If I was from an Eastern Country where text is read right to left, would such a picture seem to have a better composition when flipped?
(Blanksy - note flipped not flopped)
But in Arabic for instance the text goes right-to-left while the numbers go left-to-right. If you are scanning the negative digitally, this could have serious consequences unless you have palindromic processors.