Once I am are familiar with a format I shoot to it, it's quite rare that I will crop in printing. I can count to rolls of 35mm I've shot in the last 20 years on one hand,
These days I mostly shoot 5x4 & a little 10x8, alongside that a 6x6 TLR, a Yashicamat 124, while living in or visiting Turkey, or one of my two Rolleiflex cameras here in the UK.
To add, I personally find it very satisfying composing (or looking for compositions) at 1:1 with the 124g though. I'm not sure whether it's the limited shots available, the reverse image, the square format.... It is very enjoyable though.
Yes, shooting square format 6x6 is enjoyable, it us a different way of thinking, and composing, but quickly becomes intuitive. One thing I mentioned to the OP on Tuesday was the importance of what's at the edge of the frame, in choosing to take a shot you have already selected the subject. The fact that a TLR (no prism) laterally reverses on the focus screen, and with LF is also upside down as well, forces you to think a little more carefully at how you are framing the shot.
Although I have images of the same place shot 5x4 & 6x6, they were taken on different occasions, and more than a year apart.
I've only ever once composed and made an image using 5x4, and then used my Yashicamat 124 and recomposed using the square format, both prints are very nice, but have a different emphasis. I will see if I've digitised them.
Ian