I think there is a BIG difference between someone saying "You know, I've always thought I preferred blonde wavy hair..." even though you have brown corkscrews, and someone saying, "I would like you better if you had blonde wavy hair."
My husband is mostly bald and has been the whole time we've known each other. I don't have anything AGAINST baldness, but I always thought my "type" was a guy with thick dark hair. I still love my husband and find him VERY attractive. Of course, I don't think I'd tell him that I preferred thick dark hair (because it clearly doesn't matter)....but if it came up in conversation, I would be honest that while he doesn't have the hair type I've always preferred, I still love him dearly and wouldn't change a thing about him or his appearance.