Heath, you are right in the sense that personal preference has a lot to do with how one perceives the "looks". From a practical perspective, I prefer mine singled out. It still rides like an ox cart, just a slightly more comfortable one.It actually turns, does not push over the fronts in sharp turns, and when you have to get into the rears, you remove one wheel, not two.
With modern radials fitted, the likelihood of a flat tire is also somewhat reduced and there is a spare.
Singling it out with the original 9.00-20 does look "weird". 11.00-20 look better. 12.00-20 are, in my opinion, the best looking tires for singling out the rears. As Heath said: To each his own, of course.