And then there's an offshoot of a prophang/hover called a torque roll in which the plane uses the torque of the engine to do a roll during a hover.

My favorite 3D maneuver is a vertical climb that goes to a 3/4 waterfall (which exits inverted). Chop the power and enter a flat spin. Add power (On my plane, if you add power in a flat spin in goes up ). Revers all the throws and do some tumbles and finally let the plane fall out. Not only fun and challenging to do, but it looks really neat.