Well, what can I say? You find what you like and that's what you do.
Funny enough, these used to be my favourite colours, back when I was in school, though they've never particularly suited me. Mostly I liked brown, I think because I thought it made me blend into the back ground - definitely wallflower material...or maybe just a mouse. I still don't mind brown, thinking of it as a variation of my mouse brown hair.
I think another reason I liked these colours is that my Grandmother (Mom's mom) always liked them. I only knew her with beautiful white hair, but I think perhaps she may have had reddish brown hair when younger. In real life, Mom's hair was likely a middling brown but when I first knew her (does that sound right?), and for all the years until she went grey, she had auburn hair. Both Mom and Grandmother surrounded themselves with earthy colours.