Mohsin... since your favourites are of course all from WW2...
I like the Hawker Hurricane... (more stable than the Spitfire) with the Merlin of course, and the DeHavilland Mosquito ( fast, night bomber, fighter and reconnaisance... long distance... made of balsa wood/ rivets and araldite) and two Merlins.
But my third has to be the Fokker Triplane.....von Richtofen.... and all that. All functional and lethal in their own ways.
Motorbikes I can appreciate but having severe backache ( since settled ) from age 18 to 30 I gave up on them a long time ago. Saw a picture of a Triump Speed Triple ( modern)... did give a tingle though. Or a Ducati 996/ 999