I almost always crop my images and usually crop free form, meaning that if the original picture was 2:3 my resulting cropped picture no longer has the original nor any specific round number ratio. In other people's photographs, I always see a good photograph inside their pictures. I am always thinking, gosh if you would crop in and crop out this and that then the result would really be a good picture. Part of me feels that the world is a messy place and I want to crop out all that messy stuff without being bound to any rules. Another part of me thinks about posting pictures together in a gallery where they would look better together if they had the same ratio. And then there may be the day I am someone's second shooter or take engagement photographs where there is the need to take pictures so that they can be printed at standard ratios.
So. How important is cropping to a standard ratio? Do you always post process to some standard ratio and long size pixel dimension and why? If you have a full frame, a crop, and a m43, do you post process all to the same ratio and long size pixel dimension to standardize them?
Or. In an internet and smart phone world if you are wandering through a city or an industrial site or abandoned building, do you throw all rules out the window and crop the final picture to the edges that the picture tells you to use?

I really like the focus and isolation that the "self-mat" imparts to images.

