Besides my family, it seems as though my two passions in life have come down to electronics (namely computers) and bikes. On any given day, it is hard to pin down which is more important. I am both a web developer and an editor for an online magazine that specializes in professional reviews. This blog will probably have a little of both.
Generally, unless I do something on my own, I don't get much of a chance to be passionate about my development--though I am always quite nerdy about my computer(s).
I am, however, always passionate about biking. Just ask my wife. From the day our first child was born, I've been brainwashing them to revere biking as much as me. I'm not sure it's possible, though.