I spend a lot of time working with comedy and theater groups in the area, and I like looking for the humor in everything, especially myself. Though I do act and do a bit of improv, I prefer to stay behind the scenes and work on the technical side of things.
At the moment I'm using "Huzzah!" as my personal catchphrase whenever I'm happy about or celebrating something. It's at the point where several of my friends have picked it up, so that every round of applause is followed by a hearty chorus of "huzzahs." I get endless joy out of this for some reason.