I am, admittedly, a bit of an introvert, though I'm really outgoing around people I've known a while. If left alone I can be kind of a home body; writing, gaming, reading, chatting, conducting horrifying science experiments in my kitchen (some people call it cooking, I'm still on the fence). However, there is always adventure bubbling just below the surface.
I love being out in nature, especially when I can drag as many people along as possible. If an opportunity comes up to go camping, hiking, swimming or the like it's a safe bet I'm already packing to go. I'm pretty open when it comes to entertainment, and it's really easy to get me excited to do something. Suggest something fun and odds are good that I'm on board.
To me, the most attractive quality in a woman is to see the fire of intelligence burn in her eyes. Metaphorical fire. Though... I suppose if you could create literal fire with your mind that'd be pretty hot as well.
Oh, and being a huge nerd helps!