I can't remember a time when I wasn't writing, even when I should have been doing algebra homework. Despite this, I managed to earn a master's degree in communication, and an ecclectic resume, mostly because I couldn't decide what I wanted to be when I grew up. I was interested in so many different things. The thing I like best about being a writer is that, for the space of a novel, you get to be whatever you want. Astronaut, detective, ballerina...
I went into theatre--it's all storytelling, in its own way--but now I put my drama queen skills to work writing books, which is awesome, because I don't have to stay on a diet, and I get to work in my pajamas and take breaks to play Rock Band. (Sadly, this is the only video game I can play, as most of them make me rather seasick. I suspect this seriously reduces my gamer nerd credibility.)
My interests and obsessions change frequently and without notice, but I pretty consistantly obsess about dogs, horses, sailing (despite the sea sickness thing), history, archeology, Gilbert and Sullivan, BBC America, Star Wars, movies with swords and explosions and Russell Crowe, and of course, books.