Guy's in the 80's loved blondes. In the 90's redheads started taking more of their share. Late 90's/early 00's it was brunettes/blackhair all the way and nothing else- the blonde look retreated as it appeared trite and superficial.
Now we have more or less equality between hair color preferences, with blonde and black/brunette taking the lead because of mild-to-moderate gingerphobia
[edit] sorry it looks like brunette/ravenblack are in the lead, but my data shows that HICKS still prefer the hell out of BLONDES uber alles!!!