Whoaaa!!! I'm not worthy enough to try out the large format yet. Right now, I'm sticking with medium and 35mm format, no digital for me.
I use the medium format for portrait in my studio, 35mm for candid shot and wedding photography.
Tested out my F100 today and I've to say that I really like this body much more than the F5. Autofocus is quick and sharp and it's not big and bulky like the F5.