I never played GT1 and I enjoyed GT2, GT3, GT4, GT5 and GT6. I spent ages playing each one until the next iteration became available, no honestly I spent ages playing them all like I was haunted or something. GT2 started me on my way, so many unique cars and some still never seen again
. I still actually have two GT2 saves on my PS2. I played a lot of two player in GT3 with my brother and buddies doing tandem drifts all day on Trial Mountain, GT3 was great but tire physics were bonkers in that game, you could burn out forever in a straight line(on sim tires), lol. GT4 well goodness possibly the heftiest GT content wise there were tons of things in that game that seemingly are out of place but fit, that Jazz music makes anything Kaz tossed in the game seemingly mellow. GT4 also saw me using tunneling program to play online with others who took the time to go through the headache using Xband or whatever he heck it was called.
GT5/Prologue took GT online officially and loved it, played almost 90% of the time online with others in lobbies racing, racing leagues, shuffle races, seasonals for that cash for no reason and free cars and hanging out talking about cars. GT6 online and enjoyed the improvements to GT5 and hated the culls of what GT5 had, better garage in that game but it was rushed and had a huge day 1 patch, which I avoided and glitched cars because the economy was broke. GT PSP needs special mention as I got that to hold me when I wasn't at home, funny thing it was the first GT game that actually had in car with the correct perspective, which was better than the nonsense Kaz gave us for standard cars in GT5. Wow! Was a bit weird but I understood the setup of no single player and simply random arcade races were fun, cars felt solid even on the PSP.
NO vote for me yet, I loved all my GT experiences to varying degrees, can't choose the best one really since my tastes have changed and GT2 would have gotten the nod but it's visuals are horrendous now and sounds are literally all bees in cans in different keys. But it also had cars that aren't around anymore in any GT, so many sexy autos gone, my heart weeps for those who'll never get to tangle with the likes of the '98 Oreca Viper in it's red white and blue Le Man outfit, or all 3 of the Toyota GT-One, the original Speed 12, Venturi Atlantique 650GT LM(what a looker it was), Weigert Vector W8...the list of sweet auto history was in GT2. A Spec custom Mazda bodykits were probably the sexiest things I ever saw in GT. I have to go play GT2 now because nostalgia has been awakened.(just have to dig the PS2 out of the desk of ancient consoles)