I really don't think about blonde's much, unless they're male.
I prefer dark haired women, as well. Most of the women (myself included) in my family tree are blonde... and a vast majority of them (again, myself included) choose to change the color they were born with.
As for the reason why men like this look? Personally, I think somewhere in the back of our minds blonde's are considered "easier targets"

for whatever reason. It's all a stereotype, although some women I know (including some of my fair haired cousins) should have been the basis for that one

Dumb is just dumb, no matter what the haircolor is.
IMHO... the world needs more Snow White's - and I just so happen to be one of them (with a little haircolor help)

Mrs P