Well, I don't normally care too much about a woman's hair, altough I have to say regarding facials I love to see a long or curly haired girl. Nothing hotter when the white sperm gets caught in her hair, especially dark curly hair.
But we all like different things, and that is great.
For personal reasons I don't like bald headed women in porn. They remind me of a girl I know who had lost all her hair to to cancer.