Considering the OPS statement has truth, I would ask what plane develops one into a better, good and maybe even a great stick.
Planes that are good, but not great.
(Assuming late war; early- and mid-war offer more and better choices)
For the Americans: P-38, P-39Q, P-47, Hellcat, Corsair (except -4 and -1C), FM2
For the English: Typhoon (if you don't fly it like the P-51 pilots at issue here), Spit 14
For the Japanese: Tony
For the Italians: ....anything they've got...
For the Bolsheviks: ....anything they've got, except the La7...
For the Germans: 190A5, Dora (if you don't fly it like the P-51 pilots at issue here), any 109.
Well, hey, you asked and I do have occasional opinions!
- oldman