A few thoughts:
1. The Guvmint's Run Out of Money GB - ridiculously extended airframe lifetimes
2. The Noone Loves Monoplanes GB - monoplanes converted to biplanes, triplanes, sesqui-planes
3. The Asymmetrically Perfect GB - whatever it is (aircraft, vehicle, ship, space invader) there is no symmetry around any axis
4. The Edsel Memorial GB - glorious, ridiculous, ugly failures
. . .
6. The Leonardo Da Vinci GB - all means of propulsion, flight or fighting are based on his ideas
Ciao