Speaking from a hairstylist point of view.....You mentioned that you colored your hair black to cover the GREY. The reason why I'm pointing this out is because as we get older the darker the hair, the OLDER we look. I use to have a few clients who had always dyed their hair black for years and never realized when they reached a certain age (depending on the person, around 35-40), black made them look old and washed out. Some of them were very reluctant but, they really trusted my judgement so they let me try a new color. I used either a highlighting technique or full color treatment, depending.....the results were 100% positive. Obviously, you look fashionable to her and she THOUGHT you had a really easy going personality and wouldn't mind a change (it can easily be fixed by the way). I would ask a friend or family member that you value their fashion option and ask them "How do you like my new haircolor?" Honestly, if your hairstylist DIDN'T CARE about you, she wouldn't try something like this, she'd just let you continue dying your hair black and collect your money!