I focused on the P38J and C.205 one tour, surprisingly made #1 in fighters flying the 205. Its a great little bird, I even took the 202 up for a few spins and even managed 7 kills in one sortie!
I like the Pre war era, you die a ton, but the experience and SA gained throws you off balance when you hop into something like the P51 the next tour, its almost like going from a WW1 aircraft to Korea.