I think I'm one of the only people that doesn't like Ayu with black/extremely dark brown hair. It makes her face look weird, for some reason, I think...I really don't like the really straight look either. I'd love to see some red hair, or this color.
I also like really soft, loose curls on Ayu. I love her extremely long hair, its so beautiful. I really never did like her short hair back in 2001. It looked strange. I loved it on the Moments cover though.