About two years ago, on my client's behalf I interviewed a young Indian man for an open position on our team. I recommended him for the job and my client hired him. We became good friends shortly after his arrival, despite a 19 year age difference. (I'm older.) He may look and sound Indian, but he's as American as anybody else. How much? Well, his first car was a 1998 Lexus ES300 that a friend sold him on the cheap. (Insert running joke here about an Indian in a champagne-colored Japanese car. He thinks the joke is hilarious and so do I.) But he loves cars so after spending some time in both front seats of my ST, he caught a bug. It was a particularly virulent strain of "Want-A-Mustang-itis."
About 3.5 months ago, I helped him navigate through his first new car purchase: a 2016 competition orange Mustang GT premium. He lets me drive it everyday at lunch, and it is a fabulous bit of kit. I tell him that I can find only three faults with it:
(1) The dirty automatic. Gimme the 6MT.
(2) I have an intense dislike for the premium seats.
(3) It isn't mine.
He says that in the spring he's going to get some summer rubber for it. We're already discussing a day of driving in the Hocking Hills area of SE Ohio. We'll probably swap cars a bit while we're there. I had the ST out of the garage yesterday because it is unseasonably warm and there is no salt on the road, so he drove my ST at lunch. The things that are so great about the ST were affirmed by contrast with the GT: the fast steering, the Recaros, the outstanding grip, and the (relatively) stiff suspension.
When I bought my ST3, I really wanted a Mustang. I took one look at the back seat and realized that three sons (now 11, 10, and 8) made the ST a better choice. (And cheaper, too.) But as my seat time in the Mustang grows, I find myself wishing that my ST (with which I am well pleased) were a Mustang GT. Congrats to the OP. In my opinion, you have traded up.