Great thread.
And I appreciate Penguin Gti's comments, and I feel the same between my Gti and Polo!
IMHO small cars are always fun. You get to the limit quicker, you can feel the whole car very quickly, and something like a modern GTi is so high tech and refined, that you need an appreciation of statistics to get a buzz from what has been engineered.
Obviously I drive the same roads with the same two cars, and when I look at the journeys times they are hugely different. Cornering speeds 20mph higher and so on. I would need a supercar to go another 10mph higher, and quite frankly that would be madness wrt road safety.
GTi best all-round ride ever.