Lately I've been attracted to the square image. It's geometry reflects simplicity and minimalism to me. A square is just a circle with four corners. But beyond that, I recently realized that with my 35mm film gear, I usually take 50% or more vertical shots per roll. And I shoot mainly travel photography... scenes, outdoor portraits, street shots, etc. The way I've been seeing my 35mm vertical shots is that I wish they were a bit wider. The vertical 35mm photo seems too tall and narrow. I think even the 6x7 vertical shot would be very nice. I wonder if 6x6 would be the winner for me or would I find it too limiting at times. What makes you PREFER the square format?