As far as I believe, your entitled to your own standards - not sure how they'll work out for ya but that's another story altogether.
I really think personality and hair color are largely unequivocal. True, you'll find more preppy blonds than not, you'll find more redheads who are alternative in certain specific ways, but I really don't think - if your into brunettes, that they'll be all one way with one type of guy they're attracted to that your hair and eye color will have anything to do with them accepting or rejecting you. I could be wrong, maybe an evolutionary psychologist would debate that desire to blend genes for healthy balance would make this more salient then I think but, so far, I've known enough dark-haired couples not to think twice about it.