Age old question, often different for every pilot.
The Mission always plays a part in a purchase, but in in STOL type aircraft or something for getting in the bush we are typically on the slow end of that scale.
So in *your* backcountry taildragger, nosedragger or other airborne carrier, what's your minimum tolerance for cruise speed? 50 kts? 60 kts, 70 kts, 100 kts? How slow of an airplane will you fly before pulling your hair out?
I started at 50 only because I expect my tolerance would be short lived at that cruise speed.

