If your hair is frizzy and dried out,I would prefer having short hair.If you have long hair and its frizzy and dried out,I would prefer getting highlights.It takes away the focus on the frizziness.My hair is right at my shoulders,but its not frizzy and dried out.I have a friend whose hair is 5" and she manages it well.It actually looks cute because it's a scene hairstyle.Long hair(to me)doesn't look good without it being styled good.
