I am one of those 20.
For me, I've found nothing better than Barnack Leicas (I'm not a big M fan.) I enjoy nothing more than to walk around with a 50mm lens on mine, and a few rolls of film. Almost every single one of my favorite photos has been taken with one.
I seem to be a rare breed - all of my friends and most dealers have commented that no one else they know of uses them exclusively.