Eric, I really don't think there's a format you "should" use. I think you have to follow your heart and use what feels right and results in the least amount of chopping possible. For me, I was always chopping off the end of my 35mm frames because I naturally see square. Since squares are becoming more popular, it's much easier to find frames and mattes to suit them.

Of course, if you're doing commercial work that requires a specific format, then you have to consider that. Otherwise, do what's you.

Who are some well known photographers (besides you Cheryl) who use square format rather than 6x7?
Thanks for the grin. *lol*