Instead of having a barber NPC like most MMOs, I propose the creation of a trade profession that crafts items that other players can purchase to change their character’s hair, makeup, tattoos, and other customizable details, categorized by race. In addition to the craft bolstering more trade within the game, the patterns for the profession would act as a great avenue through which new customization options could be added to the game.
Not a perfect idea, by any means, but I feel like more aspects of MMOs should be player central, not NPC central, so anything that can feasibly be done by players, should be.