Just as was said above, it kinda depends on the circumstances. When I hear about the Mustang cars I think that the only ones I would ever want are 30 some years old and that nowadays every other person has a new one. Why on earth would I want one? Camaro's on the other hand are a completely different story!!
Aircraft? The Mustangs have a rich and decorated history. Being near one is one awe inspiring experience!! I had the pleasure of seeing a P-51 and an A-10 flying in formation at an airshow as past and present symbols of air superiority and freedom fighters. Incredible.
So I guess when I hear the name Mustang it is usually in reference to the automobile. When I hear the designation P-51_ my mind is already wishing I had one of my own!! Shoot, I'd settle for just the Rolls-Royce Merlin engine or the airframe!