A list of things:
1) Framing with my right eye makes all my images have tilted horizons. On all cameras. I still forget to 'check' my horizons before exposing and end up with an annoying choice in post: either keep the borders on the images and the slanted horizon, or lose them both. In digital, that's no issue but in film it is...
2) If you set a lens to 100 x its focal length, you will cover a space that is 100 x the size of the negative. Set a 35mm lens to 3.5 meters, and at that distance it will cover a scene that is 3.60 meters wide and 2.40 meters high. This is very useful to shoot street without using the viewfinder!
3) In spite of the previous, the formats that suit me most are 6x7 cms and 4x5 inches. Incidentally, they are virtually the same aspect ratios.
4) Also, I like 'empty' and 'calm' images, where really nothing much happens except the scene itself.
5) There could be a list of items I sold too cheaply and too soon here, but I won't go that way...😉