I love to see an attractive women with white or silver hair. The hair color just depends on the skin tone, some girls look much better with black, or brown hair versus blonde.
I would pick a single color, but if you imagine all the girls you like with that same hair color, they all won't look good unless you can see past the ugliness. I don't really see women with white hair, but those who have the skin tone for it are the sexiest to me.