i find i like any of the four combinations. Gender isn't what determines who i wish to dominate and/or submit to. i can't sub for someone who is less dominant than me, no matter if they are male or female. i was trained by a Mistress and i am all subbie for Her and Her Husband. Though my Husband isn't interested in the Lifestyle, He is still more dominant than myself and i find my subbie behaviors come out with Him too. i've also topped other subs for the amusement and entertainment of a gathering, be them male or female and i've trained a bitch boy. So yeah... gender really isn't an issue for me. It's more about personality and aura.