I did find an upside the other day, it was rather cold when we went for a walk and I kept it on because it kept my nose warm, usually my extremities suffer in cold weather 
Like everyone else they make me hot and bothered in shops, not that I stay in a shop longer than I have to. I've found myself hunting for more masks on line, I got some nice new ones through the post from GAP the other day, finding theirs the most comfortable.
Quite often these days there will be discarded masks lying in the street, maybe accidental if people pull them out of their pocket, but not a nice sight!