I think the only time I have ever cried out of sheer emotion was when I saw a spitfire fly over whitby in north yorkshire england. It was un expected I was just walking around an heard that amazing engine sound. Plus it was from my grandads squadron!. Its based down south now, just an amazing sight.
I love the P51 as well, but my all time American WW2 fighter has to be the Grumman Hellcat