Looks like I'm an odd one in this bunch. I'm a 4th year philosophy student, and in the past I've been a courier (with my old '93 Metro) and worked at Domino's pizza as a driver/manager. (Driver paid better, sadly) I suppose that putting on an average of 50,000km a year is part of what got me interested in fuel economy, but efficiency has really always been an interest of mine anyway.
Oh, and for my hobby I play DDR/ITG - those crazy "dancing" games you might have seen at the arcade.
(if you have no idea what I'm talking about.)