Limited to something I've actually built? Hmmmm, I'd have to go back and look at them all. Meanwhile, I have one started that would be The One: a '65-'66 Mustang 2+2 that would be a blend of features from the '65 GT350R, the '66 GT350, and the '69 Bullittmobile. Basically, the perfect Mustang, with a modern drivetrain. And I'd actually DRIVE it. Daily.
And it would be followed by a '68 Camaro RS in Corvette Bronze, a '67 El Camino in Marina Blue, and a '66 Nova in blue--all of which I plan to model, but haven't yet. (Haven't even started them.)