opposite personalities from the average man and woman
この場合の「男女逆」は
opposite personalities from the average man and woman
のように言うのが良いかなと思います。
例:
My husband and I have opposite personalities from the average man and woman.
He likes to take his time shopping, but I pick things quickly. I tend to be quite frank as well.
「夫と私は性格が普通の男女と逆です。夫は買い物に時間をかけるのが好きですが、私はすぐに選びます。私の性格は結構サバサバしてもいます」
frank で「率直な・はっきりものを言う」
ご参考まで!