But...
How... I look at it:

Spitfire: It's only the "coolest" fighter ever!
P-51: It's only the "coolest" fighter ever! But it sucks at turning, so maybe I'll take a spit...but wait it carries big bombs

Chance Vought: The Corsair is AWESOME because Boyington was kick-ass! And Its fast, and it carries lots of big bombs, and I can't up my P51 from a carrier.
Messerchmitt: Highest Kills were recorded by a pilot flying a 109, fo FU!. Allied equipment is for "everyone else" "wanna touch my 30mm?"
Focke-Wulff: Focke you!! my guns are bigger than yours, and I can go really fast. Plus I got to say Focke you, hee hee
Avro: I will only fly three ways: On a 2 hour trip to bomb at 30k, or to drop all my ords in a shallow dive in hopes of hitting a GV, or I'm going under the dar in a suicidal attempt to bomb the hell out of anything i can possibly hit, and then promptly get shot down.
Republic: "I want the biggest, most badass, airplane EVER, because it has tonz of ords! and it has awesome gunzzzz!!! and I will promptly fly it into the ground trying to hit the DAR.
Lachovin: "If I fly the fasted plane EV3R!! I will PWN all"..."why is it so hard to hit stuff"?
Lockheed: "twins OWN" We're different, look at us! No really, are you paying attention??
Boeing: "I will relive every single moment from the movie, Memphis Belle." But not that stupid movie with the cartoon landing gear..it wasn't "realistic"
Consolidated: "You B17 DR1V3RS are total posers!"