2008 Mercedes-Benz E-Class E63 AMG 4dr Sedan (6.2L 8cyl 7A)
I am so happy with my E63. It has awesome power, yet it's a comfortable ride for cruising. The car is versatile, and flexible. I've owned 3 MBs now, and this car is by far the best I've ever had. What a rock solid car.
The engine, transmission, my car color choice (Indium Grey), and the sound of the exhaust.
The only gripe I have is with the NAV system. I've been spoiled with touch- screen and better graphics. But that feature is not that important to me.