Age of your stylist
Most of the time my cutters have been above 35 at least - just seems to have worked out that way. However, what's more important is their SKILLS at cutting curly hair, and if they have the "granny glasses" on or not. By that I mean that when they see that one is a mature woman, they don't automatically give one a needlessly-conservative haircut and color(ugh!). I'm blessed with my current cutter who is about 40 himself and does curly hair very well and sees a person's individual style rather than their age as such. I would trust him implicitly with color if I were going for anything more complicated than what I'm doing now too. Sometimes I've shown up early so I see him finishing up on the previous appointment - unfailing, everyone, straight hair or curly, looks fabulous when he's finished, and with what ever color service they get too.