Don't judge a book by it's cover
I'm a redhead, but not a natural one. I was born blond and stayed that way until a good chunk of my hair turned grey in my mid-twenties. The grey happened practically overnight, after a particularly grueling work project that had me working 18+ hours days for about a month. Yes folks, stress really can give you grey hair.
So I did what most women in their mid-twenties would do if they suddenly had grey hair; I had my hairdresser dye it back to blond. I did this for a few years until she suggested I go red instead of blond since it would match my skin tone better. I thought, what the heck, it's the same price so why not give it a try? And she was right, it did match my skin tone better than the blond. So much so, that people have a hard time believing me when I tell them I'm not a natural redhead and that I don't have a drop of Irish blood.
Anyway, I spent one half of my life dealing with the assumption that I was a dumb blonde and the other half dealing with the assumption that because I have red hair, I have a temper. And quite frankly, if people are going to assume anything, I would prefer they assume I have a temper.