Madness in cycles
I recall working -- ooh, a few years back -- with a couple of people who liked to use dark-on-white (dark blue, I think, was their preference) schemes in text-mode DOS on CGA screens (I said it was a few years back) because it was "easier to read".
Yes, it was easy to read ... until you made the text scroll, when it flickered like a disco and made my eyes hurt to look at it.
Nevertheless, my colleagues insisted that the default white-on-black was harder to read ...