My first; 1988 GT
My friends; 1993 SVT
Mine; 2006 V6
Recently, at the Ford Dealership; 2013 V6, 2013 GT.
And I know this won't count, but when I was about eight years old I got to lap-steer a family friends cherry red 1966. Probably also won't count, as I was a passenger, but a perfectly unmodified, unrestored, showroom perfect King Cobra.
Oh, and an F-150 (which counts because it has the same axle! LOL)