Personally I enjoy the communication from people who are in the know when I am doing my pre/post flight stuff and by those who are the curious type (meaning someone who is involved in the hobby, and not just a spectator).. Reason being, is they may have value-able input that would result in a better way and it helps me voice what i have done, what i am doing, and how i am doing it. If they do not know turbine operations. The only times i ask for complete silence are during the start-up sequence and that is when myself and my extinguisher helper are the only ones communicating if their is the need for it. The other times are for take-off and landing, as i prefer to be able to see and hear any thrust adjustments and to recognize via sound if they dont happen. Other-wise during the flight i enjoy a simple conversation that does not require alot of thought as it helps make the flight more enjoyable.