I took many passengers flying in my time in the RAF, mostly in the Tornado. I always felt it was important that the pax enjoyed the trip to the fullest. If they were pre-occupied with the thought of throwing up then they were not going to enjoy the flight, so I would try to ensure we were always in an environment where this could be avoided.
The most memorable pax flight I did was in Goose Bay. A good mate of mine and I took a couple of the groundcrew flying in the training areas. Great fun going very fast and low! Needless to say, the 1:00 spent rushing around in tactical formation was thoroughly enjoyed by our passengers.