The concept: Comment and I will give you 3 interests on your list, and 3 icons, for you to explain. Then put it up so I can bug you to ask me.
This icon is a picture and a quote from the movie Antitrust. The quote is support for open source. I use it for any computer-related topics.
This icon is a picture of me with 20 clothespins on my face. It was taken at a Forge Road Bible Chapel retreat, when the contest was to see who could put the most clothespins on their face. I use it for whenever I'm in a really crazy mood.
This icon is from a screenshot of the movie Revelation. It started out as my icon on the Sevilian Board before it migrated over here. I use it randomly.