I have played throughly every GT aside GT4 - which I own but it is sat there waiting till I set myself up with a PS2 system. Gran Turismo is and still is a stunning game with an extremely unique feel to it. This is mostly due to the top end cars being the kind of cars the average person of a working wage could afford and own - you can relate to the game so much. Gran Turismo 2 - still stands as my favourite GT, with 650 Cars, Classic races, LeMans integration, Rally integration and just hours of fun - it's just a masterpiece. Gran Turismo 3 - a great game with the F1 integration sneaking in, even more so LeMans Group A but it was a tad too easy for my liking.. Gran Turismo 4 - As said, only had played a small portion of GT4 (due to selling the PS2 at the time as no TV) - I enjoyed the back to serious attitude Polyphony applied to it and the development time - it seems to be the Gran Turismo 2 evolution. Gran Turismo 5 Prologue - Absolutely love this game - driving wise moreso than GT2 and by the look's of it will be the best GT to date. As said, qualifications and common thing's such as Racing Car Modifications finalization mod for second hand/new cars need to come back for the complete experience. That's just me and I could be wrong.