To start, I love literature and poetry. I'm also pretty keen on film and television. To me, the only thing more attractive than a girl that is well read is one who writes good poetry.
I love conversation. It's strange because I'm also very shy and reserved. I'm not normally comfortable in social situations. But I like talking to people and I love being with people (I've been told that I sort of bounce when I'm around other people). And I really like people who I can have good conversations. People who say things that are witty and thought provoking. People who actually understand and have thoughts about things. People who don't think the height of wit and culture is quoting Family Guy because I said something that vaguely corresponds to the scene.
As someone pointed out to me years ago, I am a geek, just a different type than your normal geek. I obsess over movies and literature and poetry. I actually can recall the plot of every movie I've ever seen and can identify any movie I've ever seen from just a random few seconds of the film (sometimes I can even identify movies I've only seen trailers for many years back). I like comic books, and anime, and playing video games, and playing board games. I'm not into pen and paper role-playing games (I hates 'em), and I'm not too keen on doing anything with computers beyond browsing the web, watching streaming video (I like Hulu), and typing. I also have this compulsion to collect sets of things. I work very hard to suppress it because I fear that one day it will consume me.
In the past, it's been easier for me to develop crushes on girls who have shared some of these interests with me, although it isn't mandatory.
I'm a fairly active person. I like to exercise and workout, and in the past few months I've started going back to the gym. I also like taking long walks and swimming. I don't need someone who is super-athletic, but I would like a girlfriend who at least enjoys some kind of exercise or physical activity. It encourages me to take better care of myself and stay in shape, and I'd like a partner who would enjoy doing physical activities with me.
I'm also a very spiritual person, although I subscribe to an eclectic minority faith. I don't need a girlfriend that believes exactly what I do, but I do need someone who would be accepting and tolerant of my beliefs.
I tend to be a very scattered person. My attention drifts from subject to subject rather quickly, and I go off on weird tangents in conversations, only to return to the original matter hours later. My thought process and my imagination work much the same way.