Echoing a lot of what has been said here already, I'm always a little more "on" for an Actual Play game, for better or for worse. If I'm off-the-mic, so to speak, I can retreat inward, think about my next move, snack on chips, or just be a silly bits monster if I want to be. That audience awareness is a powerful motivator in terms of how I approach a game or a character, and I think it's something that can be stifling, or it can be really empowering if a game, or a player, or a session, really makes the most of it.