I'd really like to have a barbar/hairstylist in the game (like you guys had in New Vegas), so I think it would be pretty badass to have Deity dedicated to personal grooming; a divine character that plays off of the tale of Narcisuss, with an emphasis on vanity. Following this deity would give certain traits a bonus based on Charisma (or the P:E equivalent) like resistance to disease (persona hygiene) and persuade (NPC's cannot resist the hypnotic scent of your mustache wax!).
This Deity would be Lawful neutral. Personal Grooming is considered a discipline.