I use my middle name; I'm rather forced to. My parents named me after a very good friend of my father's who died in Vietnam right before I was born. However, they didn't realize that "Richard Burton" was also about to be a world-famous actor. And what's more, there are a lot of Richard Burtons out there. Many more than you'd think. So I tend to use my middle name to keep things clear, since some of my very extended family tend to do some rather unsavory things.