Personal hygiene isn't as always as personal as it sounds. There's a pretty large social aspect to it. It's not just a matter of how your cleanliness affects you, but how it affects the people around you. And so we do feel some social pressure to keep our bodies as fresh and clean as possible at all times.
But there's an argument to make that there should be more of a personal aspect to it than merely going by whether others crinkle up their noses when they get too close to you. It could be important for your overall health.