Best looking... definitely a "relative" term...
I used to be a big fan of WW aircraft... still am, but my appeal for modern "eye candy" is ever increasing and has now supplanted my WW views with the exception of the DR1. The order is pretty close, a few in the list are so close they are basically tied.
- Fokker DR1
- Grumman X-29
- Lockheed F-117 Nighthawk
- Northrup Grumman B2 Bomber
- Vought F4U Corsair
- Supermarine Spitfire (I prefer the ellipse winged versions)
- Lockheed SR-71 Blackbird
- Boeing B-17 Flying Fortress
- Virgin Galactic White Knight One
- Lockheed P38 Lightning
Notable mentions...
- Aérospatiale-BAC Concorde
- Dehavilland Mosquito
- Airco DH.2
- Junker Stuka
- Heinkel He-111
- Boeing 747
- Antonov An-15
- Antonov An-225
- Fokker E111
- North American P-51 Mustang
- Where do I stop???