GT5 is good only because its a rehash of two good titles in the series - GT5

and GT4. Literally all PD did was slap them together and toss in some rushed things like Track Creator and shipped it off - even nabbing some extra coin from suckers like myself who thought it'd be good enough to justify a $100 Collector's Edition.
GT5 is by far the weakest game in the series. It doesn't make any statements and if anything made PD and one of Playstation's biggest exclusives look extremely mortal.
What exactly were they doing in those 5 years between GT4 and GT5? Nobody knows... they were probably playing Forza. But really, Kaz seemed pretty occupied. Between designing digital multifunction displays for the GTR and all of this racing with the 24 hour Nurb and such... Its apparent GT5 was definitely prioritized somewhere between brushing teeth after dinner and going to sleep.
PD just seems too busy with all this extra attention they've garnered from their past successes (most notably GT4) to care about yet another Playstation game. It's like as if... they're trying to do other things but still have this contract with Sony and every once in a while Sony prods Kaz inquiring about its product and he hurriedly says "yeah its coming, we just wanna make it perfect" and goes back to designing yet another project for Nismo or running in another 24 hour Nurb event.
There is just an overwhelming arrogance this time... They have better things to do ATM so they slap this little PS3 game together and sell it for quick money to continue doing things that aren't GT or even gaming related. I'm not even sure if PD's heart is still in it... just seems like something they're doing to just pay bills because the passion is definitely missing. It's a very incomplete, rushed, and embarassing sequel to an otherwise very prestigous and solid franchise.
GT5 captures the very bare bones that every GT title had before it, and this is enough to keep me coming back. But it is somewhat insulting when this is more or less GT4 with a GT5 demo mixed in the programming. So from this stand point, I can say that I'm disappointed... content... but if anything else... disappointed too.