Despite my defense of cropping, I don't actually crop that much. I looked around at the prints I have hanging at the moment at home and noticed that I tend to crop 35mm more than other formats. I usually chop off the ends and make it a bit more square. Maybe that's a sign that I should sell my 6x9 rangefinder and buy a 6x7 or 6x8 instead (Fuji made a 6x8 rangefinder for a while), since I seem to see that way more naturally.
I occasionally crop 8x10" contact prints. I don't see contact printing vs. enlarging as an issue. I can crop with a knife and a straightedge (either the neg or the print).