I think it is purely personal choice based on your style of shooting, I have shot, 35, MF and LF for many years now, and there are certain shots that just work on certain formats...

Looking through a ground glass, is an exciting experiance, as is looking through a viewfinder at a charging Bison on 35mm, and the waist level shooting of 6x6 has it thrilling moments as well,

I would hate to think, I would have to limit myself to any one format...not in my make up.