Its not the first GT I've played, but certainly the most addictive. The fact that they made licenses optional was a real boon to me. It sorta impeded me when I was advancing in GT4. Didn't enjoy the tests, but maybe its just me. Well, PD put it in the game, I will still try to get gold for it for the trophies I guess. Graphics wise, its just the shadows. I don't really mind the bland environments, when I am speeding past them at 200mph they do not really matter.
Menu-wise it didn't bother me one bit. I thought it was pretty cool. Granted, some things were a bit confusing to find at first, but nothing really counter intuitive. Anyone with some brains and patience should find anything they are looking for. When everything else fails, there is always the internet. Anyway one thing that bothered me a little, just as GT5p, was the listing of cars that met the requirements of the race. Will like something more automated. Now is like going through a list and trying to find a car that matched the requirement. For a car noob like me, it really isn't friendly. I end up always looking for Hondas and Toyotas as I can remember some of their real life counterpart names.
Online portion is as what reviewers said, extremely unfriendly and feels dated. If you have a strong community, there is no doubt endless fun in there. 16 cars online is a real joy to behold. However, if you're entering the lobby alone, it is really unfriendly design and it feels 90s as well. I think kaz said something about matchmaking and online credits, well, it will be great if it happens, even if it doesn't, I wouldn't mind. GT is about single player. There is simply soooooo much to do.
Now onto the good parts. The portion that really wowed me was the special events. After playing through the all the fun of karting, I went straight into NASCAR. Oh boy how different the two felt. Even through my DS3 (unfortunately), I can really feel the difference in handling. That was the time I understood why reviewers all said about the unrivalled gameplay. Its simply amazing. Each car handles really differently. I spent an hour on a kart race. When I finally won it, I went back to the normal cars and crashed at every corners. The handling is really different and I ended up crashing my way. lol.
I could go on and on about this game, but ultimately, I have spent like 10 hrs on it already since I got it yesterday. Its simply the most addictve GT I've played. Its so incredibly deep and I am always looking forward to unlocking a new event or track. I really love the level up system and I think its because of it thats got everyone hooked.