When I'm attracted to women, they are almost always younger. The first girl I liked was the same age as me though; I think that was because she was on the same block, and I really don't put adolescent fascinations in the same category as adult attraction. I last saw her in her mid-twenties: no longer very appealing, but her younger sister, who I had actually babysat when I was a teen, was now a very attractive 18 year old herself.
OTOH, I've had one strong attraction for a much older woman. FWIW, I'm best described as "bisexual" for those who need categories, but in reality I don't like manly-looking men at all. On the "right" planet, there is only one gender and everybody is a longhaired hermaphrodite.