I use an Olympus OMD EM1 Mark 2. I am overall very happy with the camera but I don't really understand the reason for the 4/3 aspect ratio of the sensor. I don't find the four by three aspect ratio all that attractive in images. I think 3x2 is more pleasing to the eye, and closer to the 'Golden Ratio' of 1.6. Most ready-made picture frames tend to be of a 3x2 ratio, which is in common with the aspect ratio of a full size sensor. I can select a 3x2 ratio for my pictures, but in so doing, I'm wasting ~ 10% of my pixels. I love mirrorless cameras, but I am confused as to why the 4/3 format was chosen. Any thoughts?