You should compose for the image you want to make, not be enslaved by the format of the camera you own. I use a Hasselblad a lot because I love square format, and it gives a large square neg, but some images work better as a rectangle and I have no problem with cropping as needed. The image is what matters, not the gear. No one cares if you cropped, they care if the photo says something to them, and composition is important for that.