If I don't need to have owned one... Hmm.

Original (maybe 1932) Daimler Double Six

or 4 1/2 litre Invicta low chassis

Or speed 6 Bentley

or Facel Vega HK500

Or SSK Merc

or Allard J2X

Or SS100, or maybe XK150

or TVR Tuscan V8SE (about 1967)

Or Gordon Keeble GT

or Morgan Plus 8

Several Bristols are possible...

Aston DB4 Zagato

How could I forget - the 1 1/2 litre Straker-Squire.

So many cars, so little space...

Bugatti Royale...

Maybe a Pegaso...

Or an Isotta Fraschini...

Oh, and a propos planes, the funny thing is the Fokkers (not Folkers) were German in WW 1, but Allied (Dutch, I think) WW2