Patrick,
(a bit of sarcasm, just kidding, OK?)
Forgot to mention that when I redid the interior last winter, I replaced the bouncy springs in the seats with high density foam. And I also added seat heaters to both bottoms and seat backs.
I totally agree that "Hearing the engine, the gears mesh and exhaust tone is such a satisfying experience for me," but so much more so when my butt is comfortable and not frozen to the seats on a chilly fall night with the sidecurtains on and the top off.
I am not taking it the wrong way, this is my opinion just like you have yours. All mods that I do are totally and completely reversible without damage, for the purist at heart. I even keep all of the original parts and hardware, completely refurbished, and tagged on the shelf in case I change my mind someday. But since I don't plan on ever selling any one of our cars, it is moot. Without these creature comforts, my wife and I probably wouldn't drive as much as we do. And if such amenities were available back when the design was first carved, no doubt that they would be popular options. But back then, even the heater was optional!
So purists pack your wool tartan blankets. We have our polar fleece blanket and nice warms buns, a 5-speed for those long highway drives and a FM transmitter so we can play our MP3s on the (hidden) radio.
Enjoy!! And I sincerely apologize in advance if I offended anyone. (the seats are REALLY nice)