I seem to be stuck with the draw for my irons, and straight to draw most of the time with the driver, but I would take a fade in a flash if it could be my natural shot. I think big power fades are far more reliable and impressive than a draw. I think the important thing is to stick with your natural shape and not try to change it. When I'm playing my best I usually hit pretty dead straight, but if I miss it's usually left, or like most people whichever side the OOB is on
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As for rolling the hands, when I get everything going properly I don't feel the hands at all through impact, as the arms and hands just react to what the rest of the body has done and follow the body through impact. I think the key to getting distance is getting the lower body moving first. Hips rotate left, legs follow hips and get all the weight over the left foot, chest and shoulders follow the legs, and arms and hands catch up at the end to whip the clubhead through ipact. Or at least that's how it feels to me.