Fun thread this. Being yet another warplane-loving pacifist. my EUR0.02 worth of favourite planes would have to include the de Haviland Mosquito, wooden, beautiful - and fast!!Spitfire and Lancaster get plenty of mentions, as does the P51 Mustang - strange how so many of them were powered by Rolls Royce Merlins.
The WW1 Albatros was a pretty machine, too and streamlined far better than most of its contemporaries.
What looks right usually works.