Hey! I may be male, but I can sure tell something about auburn hair color. For most of my life I was natural auburn hair colored. Well, I'm 42 now and I'm shaving my head; You already know why. But on the other hand - I loooooove auburn hair color - my wife "wears" it. She was actually artificial blonde for more than 20 years, but she decided to change that few months ago. I can tell auburn red hair changed many things. I wouldn't wanna name all of them, but there are significant changes 
I hope this won't be considered spam or anything like that, but there's a nice website right about auburn hair color I'd recommend to any woman:
http://www.squidoo.com/auburnhaircolor
Bottom line: girls, use auburn hair color - it shows passion and joy!