Question inspired by this article:
petapixel.com/2026/01/08/the-photographers-guide-to-breaking-your-own-rules/
There's lots of "rules" or conventions in photography.
I always break the 'rule of thirds' which seems to address the placement of subjects in a frame other than dead-center.
I prefer using the Golden Ratio for subject placement; for me, a thirds placement puts something a little too far from the middle of the frame.
RawTherapee offers cropping guides for both thirds and Golden (which they call 'harmonic mean') ...
The posted images are not cropped as such, they are screenshots of the same image showing the two different sets of guidelines.
Generally for placement, I personally estimate where the centroid (center of area) is and place it that point. Calculating the centroid of an irregular, asymmetrical subject is beyond me but, for photographic purposes my mind works well enough.
I'm interested to see if anyone regularly breaks a particular rule or even several in their own work.