You folks that drive honkin' bug ULF's (bigger than 16x20)...

Are you mostly fim shooters, or do you blend your own?
How important is a razor sharp image to you?
Or do you gravitate to a more mellow image quality?
Do you Chaps&Gals use these behemoths for portraits?, grand landscapes?, high end advertising?, Gandolfi style art?...???
What focal lengths and apertures are you looking for?
Is a shutter mandatory?

Just curious.