F4U Corsair. 2000 HP of Zero-eating death.
Such a good noise.
Most seem to like the Mustang, which, don't get me wrong, is a very pretty airplane... but there's something to the Corsair that I like. Maybe it's just one of those contrarian things that makes me who I am. Still, I think it's one of those classic arguments, like Glock vs. 1911, where both sides can have very good points.