I would prefer if the option for bisexual/pansexual was left as an option. I think that rather than andro/gyno, it may be easier to have 'hetero' and 'homo' as the options. Straight people can be straight, Gay people can be gay, Bi can be Bi, Pan can be Pan, etc. It seems to me like you're complicating it way more than it needs to be. It was fine the way it was the first time, but checkboxes would've been better than radio buttons.
It seems like these 'check here' O/Os are slowly taking over the actual creativity and writing of an O/O page, where you can describe more in-depth about what types of characters/sexualities you play.