Lately I have become a bit more flexible with the aspect ratio. At first I couldn’t separate myself from the 3:2 ratio, and I still like that the best, but I found that for portraits it leads often to ‘empty’ space which did not contribute to the image. I do not mean functional “negative space” but just superfluous real estate.
So I am experimenting with 1:1 and 5:4. The serie i am making now of people on the square in front of the railway station is very suitable for learning the artistic impact of different aspect ratios. This photo was cropped to 1:1, the diagonal playing an important role in the composition.