Showing off the uniqueness of your aircraft is the key to a good display in my view.
My display flying was done in helicopters and they are not as "sexy" as airplanes can be when doing aerobatics....trailing smoke...etc.
When flying the Bell UH-1H in displays I realized the sound of the helicopter is what was its most unique attribute.....and flown correctly it can be made really loud with that iconic sound it produces.
In a steepish 180 turning descent at near max power....it is possible to rattle Wine Glasses off Tables in the VIP section of the Duxford Helitech I am told.
Perhaps that was a bit of exaggeration but it suggest how loud and she was in that descending turn to fly along the Display Line at Vne of just over 100 Knots which is slower than any slow pass by an airplane.
That being said....people remember that flight.