Well, a couples of times a year i fly with my father aboard piper pa12, almost category 1
And my best memories are from last year at electromechanical tech secondary school, we worked on III air force base, i was assigned at hydraulics, they let us put our hands directly on the airplanes after a few weeks. Was at category 4 =D
This was the plane, IA-58 "pucará" (indian fortress):