Of all of the people on Facebook, not everybody is "male" or "female". Some people are bigender, trigender, genderfluid, pangender, etc. Gender isn't "black and white", so to speak. I would like all genders to be represented, to be listed.
And in regards to the "Interested in..." section, not everybody is interested in men or women, or both. There are more sexual identities that "gay", "lesbian", "bisexual" and "straight". Some people are pansexual or asexual, for example. In addition, some people just identify as "queer". I want all sexual orientations to be listed also. I believe that the "interested in..." tab should be called "sexual orientation", as well.
I would imagine that if Facebook made these changes, people, such as myself, would feel more included, more true to themselves if they can put the exact terms that describe them, what they identify as, in the "Basic Information" portion of their Facebook account.