I think brunettes look more exotic, but blondes grab your attention better. Both are equally attractive. However, some girls look better with a certain hair color.
Newbie, I know that most chicks like dark haired guys better. Its for the same reason why guy's seem to prefer blondes.
Dark hair makes you look more mature, and girls always prefer older men. Blonde hair makes you look younger, and guys almost always prefer younger girls. There is this girl I know. She is in her late 30's and is a brunette. Anyhow she dyed her hair blonde one day. The first time I saw her it was from behind. I swear I thought it was hot 18 year old. I was shocked when she turned around.