When I was 17, my jazz choir teacher introduced me to the Jim Dunlop Jazz III guitar pick (in black, incidentally). From then on, I was hooked. When I wasn't strumming or swinging my whole arm for Texas bluesy goodness, I had a black or red Jazz III in my hand. It was especially great for jazz as I could hybrid pick for comping...that was before I even know what hybrid picking was.
Fast forward a nearly a decade and a half.