I have a minor conundrum that I think the crowd-sourced wisdom of TSD can put to rest. I am considering whittling a new brush handle. So far, I've got one that I can stand upside down on the counter (like most commercial handles!) and two that will not stand on their own. While its not that big a deal, keeping the flat top impacts my "artistic freedom." Oh, sure!... I know it is my brush and "to each his own," but I hope to have a surplus that I can then offer as trade goods right here on TSD. Assuming 1) the "high mountain badger" knots make it here on the slow boat from China 2) my quality gamble pays off, am I the only one who would like to bless his or her routine with the Mac Daddy of Badger hair? (Shoot, Bubba! If''n I hit the jackpot, just the knot is $56 over at TGN! Maybe I did and maybe I didn't, but I hope to know in a month!)
I wouldn't think you'd want to dry it out laying on the counter but other than that it would depend on how you use your brush. I make my brushes so I can stand them up to dry. When in use while shaving I usually just lay them in the soap container so it's not really an issue.
I dry my brush by hanging it from a holder bristles down..If you use a stand or holder for your brush it's not a big deal if the end of the handle is flat or rounded or other....I bowl lather so when I need to lay it down during my shave I just put it in my lather bowl..That said I think I'd rather a brush with a rounded flat end for comfort when lathering....
My wet brush gets hung bristle-down to dry, hanging from a stand that resides near an open window. The next day or so, the brush gets moved to allow room for the next wet brush. The dry brush (or at least 85% dry) is now placed bristle-up next to stand to finish drying. All brushes wind up bristle-up when dry & not being used.