The Bf 109, in all variants. But if I had to choose one, it would be the E-7, F-2, G-6/AS, or G-10, simply because we don't have these necessary 109s in the game, yet.
I like the Bf 109 because it was the greatest fighter of World War II, of course.
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P.S. The Spitfire looks like a plane meant to appeal to women, like a Mazda Miata.