Looks like Bisakok beat me to this revelation...
I think one could reasonably suggest that 8x10 = 4x5 is the most “classic” proportion, a standard in photography. And in this poll, so far, it shares a very modest 13% disfavor with four other formats. By contrast, the most disliked is 6x7 with 42% thinking it’s the pits! This is very curious, since 6x7 has the same 1.25:1 proportions as 4x5. 🙂
The poll listing shows 6x7 as 1.16:1 (70/60=1.16) while the actual framesize is 56mm x 70mm + /- a couple mm variation among different camera brands. And 70mm / 56mm = 1.25:1, same as 4x5 and 8x10.
Because of the way 56 x 70 is commonly rounded to 6x7 in our terminology, it deceptively seems more nearly square than it really is. We could call it 5.6x7 but that’s awkward. Perception and deception! 🙂