At their joint interview, yesterday, at All Things Digital in Carlsbad, Steve Jobs and Bill Gates were asked what was most misunderstood about their relationship. The Apple chief exec, who has jostled with Microsoft's founder for two decades, joked to the crowd at the Carlsbad conference: "We've kept our marriage secret for over a decade now." But it was Gates, usually unsentimental, who tugged at the heartstrings: "I don't think either of us has anything to complain about. ... I miss some people who've left the industry. It's nice to have someone like Steve around." The full video, after the jump.