I noticed my first grey hair when I was about sixteen. My mother was 100% grey by the time she was in her late thirties. I put off coloring my hair at all (not even box color) til I was in my late twenties, and, then I couldn't stand it anymore! I've been coloring it ever since, every chance I get (i.e. when I have the money!). It's fun! Right now, I had it done in March, so it's looking pretty rough, hahaha, but, that's all right. I'll eventually be able to play with it again.