I can't speak for others, but the aesthetician has himself steady work with me as a client xD. I like to give the impression the my character's hair grows, gets cut, and loses the color of dye over time for a bit more immersion and realism. How frequent I change just depends. It isn't always daily but definitely multiple times per week. The inns not having a crystal bell was one of the first things I noticed about the first when exploring the Crystarium.
