I prefer women with natural hair, of any color. Whether they are blondes, brunettes, or redheads, I like for them to keep the original color intact, rather than dye it or highlight it in any way.
Even if a woman has gone gray, that's fine. I'd rather see her that way instead of artificially coloring her hair.
+1
Though my GF dyes her hair red and it comes out nice, I don't really like it, but it makes her happy and I like that