Blondes Always Look Younger...
I saw a documentary a few years ago called the The Blonde Mystique. I'll save you the long sordid storey of some of the experiments that they carried out, but they set on a quest to discover the truth or fiction behind the enduring mystique behind being blonde. The most interesting part to me was that, next to brunettes, blondes will most often be guessed to be 8-10 years younger than they actually are.
This is really true for me. I'm just short of 35, and am almost always guessed to be under 25. I was ID'd at a liquor store just three months ago!
I don't mind appearing younger than I actually am. It's flattering to me to still be ID'd, and I wouldn't change it at all!