I am 26, live in California, and do engineering stuff at work. Reading and playing video games are two of my favorite hobbies. :) Before I came to the US I used to read a lot of sci-fi and martial arts genre books, now I read sci-fi, fantasy, vampire flicks, and mystery/thrillers mostly. Oh yeah, I also get a weekly comics fix, and I read both American style comics and manga.
I like reading books that are descriptive enough to create a different world for me to experience, though I don't usually read ones that are so descriptive that I fall asleep or lose interest in them (lord of the rings is a good example..). I usually keep getting books in a series once I start, but I hate it when a writer starts to lose his touch and still publishes like mad.
That's all I can think of for now. I look forward to starting the book exchange and making some new friends!