“There’s language in her eye, her cheek, her lip,
Nay, her foot speaks; her wanton spirits look out
At every joint and motive of her body.” - William Shakespeare, Troilus and Cressida, Ulysses, scene V

Definition:
1. (n.) A behavior of becoming attracted to or aroused by intelligence and its use.

Origins: From the Latin root sapien, wise or intelligent, and Latin sexualis, relating to the sexes.

In all the various ways we seek to label our sexual preferences, to share with others what it is that turns us on, here we have it: Sapiosexual, the closest orientation I feel that defines me. I used to identify as a bibliophile, but I moved past that.

There are many many forms of intelligence: cultural, emotional, structural, historical… Any type of deep seated inner wisdom can be an intellectual prowess that I find irresistible.   It is inline with being a Gemini. The dual sides, the double extremes: yes, I do want both depth and surface.  

Also, sapiosexuality, for me, transcends hetero/homo sexuality.  I flutter like a moth around those lightbulb type beings. A brain sparkling from kinetic energy and the light of insight shining from behind their eyes. I can own that a strong physical attraction matters a lot to me in regards to who I choose to spend my time with. But there is a prime differentiator that I have a hard time explaining.

The intellect that turns me on is one that can not be denied. It is the difference between attempting to prove superiority by wit and a person who just oozes knowledge as a way of being. Beyond contrived conveyance, it is simply how the person moves through their world with trust, with accuracy, with understanding, and with curiosity.

Source: http://thesexpositiveparent.com/sapiosexuality/