It's challencing to fill the square. Used medium format for some years. Still have a Zeiss Icon Super Iconta. Maybe I'll use it again someday to reach peace of mind. The square fascinates me. I once owned a Hasselblad. Last year (2010) I bought myself a Lumix. It gives me squares if I wish, and I do. It seems very natural to compose a picture within a square with no space left over.