With all the power of a medium format camera, I'd feel obligated to take only the best photos. Anything less would be a waste of film and an insult to the machine.

Even with my new Rebel, I use it sparingly. But with my little Canon A650 and the S50 before that, I capture anything and everything, multiple times even.

Medium format + scanning is tempting. It's great to zoom in on a picture and just continue to see more and more detail instead of pixels.