I can honestly say that nose hair has never been a concern while riding. Like most adult men, I do trim it back periodically, but riding down a road thinking about my nose hair has never happened..
Wasps up a sleeve or more frequently getting trapped in a vent on a jacket, and stinging the [censored] out of me, that's happened a few times. One recent one was while riding along, a spider went walking across the inside of the facesheild. That got my attention. I now pull the pads before each ride, to check for the creepy little buggers.