We have a small car collection (including an Audi R8 and Audi RS6), the Porsche is not the quickest in the group but it is the most reliable. Its a C4 with the sports package. The C4 corners better than either Audi and there is nothing to compare to the freeing feeling of driving the Porsche with the top down! I have replaced the sound system and added navigation and a radar detector. The car now has 60k mi on it and I have not had one mechanical problem.The battery had to be replaced once and general maintenance that's it! The Audis have had numerous problems and they are both years younger. You cannot beat the elegance, classic style, performance, and reliability of this piece of art!
The sound of the engine, low maintenance costs (for a car in it's league), comfort, easy to obtain parts if needed, lots of after market options to personalize your car (like carbon fiber accents), and it is a timeless piece. Love it, love it, love it!
I recently had a new top with a glass window put on the car, this improved visibility with the top up. I also recently upgraded the sound system. I am going to change the exhaust as well soon, but love the sound! I finally found an aftermarket cup holder for the center console that actually works.
Few products will ever be as iconic as this car. Nothing else is a 911. Period. The styling is classic and timeless. I suppose that's attributed to the rules and principles of aerodynamics, they won't change either.
Body style, cornering and overall handling.
Better cup holders. Beverages "launch" from their seat upon sudden acceleration. Blind spots are bad with the rag top up.