I carry a camera with me everyday, usually three at one time. For daily carry those cameras are 35mm and that is because of the convenience factor. I tried carrying my 645 and the 67 (not at the same time) but they were just a little to inconvenient to do so on a daily basis. Now the only time I carry the MF cameras is when I have a specific idea for a shot and I want the ability to enlarge beyond the 8x10 limitation of 35mm. I must say tho that if I load the 35mm with a slower speed film like 25, 50 or even 100 ASA, that I can usually enlarge beyond what is normally considered the limit for that format with out a lot of grain.