Although most of what he paints is military aviation, his subject matter varies from landscapes and still-lifes, to pin-ups and portraits. Aviation, however, holds a special place in his life, not only as a worthy subject matter but also as a primary vocation. Darby has been an Enlisted Aircrew member in the U.S. Air Force off and on since 1986. He is currently a KC-135 Boom Operator in Oklahoma. He loves the job which offers him a unique view of aviation that most will never know.