There is no term for couples like us. We are "one man and one woman" . . . sort of. We are women who like buying the flowers, and men who like feeling pretty. We are men who enjoy cooking, and women who take over the garage. Our gender roles are often the opposite of what people would expect, and we happen to like our partners the same way.
This forum is for building community with other couples like us, because we are generally unacknowledged. Our relationships are beautiful and awesome, and our gender expressions don't make them a joke.