I got interested in fixed gears because of Sheldon Brown and his zealotry for it
I got interested in fixed for commuting because I feel that a commuter bike for me needs to be low maintenance. And ya can't really get any lower maintenance than a fixed gear, right? I'm lazy about maintenance myself, so if I'm going to ride a bike at least twice a day for at least 5 days a week, I want something that's not complicated to maintain.