I prefer black hair or brown hair for anime characters. It's the natural hair color for japanese people and I think characters look good with that hair color.
I don't have any such preferences. In fact, I never noticed the hair color much at all.
Well all the colors do look good in Anime rather than in real life
blond colored hair. every character look good with blond hair color and it's not often you see it. many times it's pink, black, blue, green or some other color
i like different colors and isn't it refreshing and easy to tell who is who in anime? you can't do much with the faces and not all the characters have the same outfit all the time.