Less metaphorically - I'm looking for someone who is confident, active, challenging, intense, capable, and connected to something larger than themselves. Someone who can look me in the eye figuratively if not literally. Someone who can surprise me, who knows stuff I don't, and who can hold her own in conversations with, well, anybody.
On a strictly practical level - part of the point of all this is that I'd like to meet someone with whom, eventually, to do the raise-a-family thing. I don't mind if you already have a kid or two, but I'm pretty sure I'd like one or two for whom I get to be dad from the beginning. I'd like to find someone who could teach our kids the things I can't (gardening and music come to mind, though the list is obviously longer than that). I'm secure enough in my "manliness" (fourth degree black belts can do that) so I don't care if you make more money than I do, or don't want to put your career on hold to stay home with the kids full-time. Assuming we inspire each other enough to have kids in the first place - I'd probably want to have your back in any case.