The moment you say it's not worth half of what you paid for it. If you've been having fun with it, how wasn't it worth your money? Should we assume that you're going to take it back because it wasn't worth half of what you paid, or should we assume that you're really just over-stating the case?
I'm starting to get irritated, so I'll write this slowly, since you obviously can't read very fast - else you'd have gotten my meaning by now.
YES, I had fun with GT5, up to the point where I ran out of races to race, which was 1 month after buying it and I didn't even play very excessively. I had multiple times as much fun with GT4 for less money, so basically GT5 is MUCH LESS value for MORE money.
I can't take the game back, neither can I take back the PS3, which I bought only for PS5. The law in Germany dictates that if you sell a faulty product, which an unpatched GT5 undoubtably is, you have a certain time to repair it, which they did. The law doesn't take into consideration if you're technically equipped to download a huge 700MB patch, but it exists, so PD fulfilled their legal obligation. I can't walk into the store to say, "sorry, but the game I bought this PS3 for is badly designed and grossly overpriced." If that option existed, I'd have done so by now.
To give you an idea. I had GT2, GT3 and GT4 before. GT2 was a nice Mercedes Sportscar, the best you could get at the time, so when its successor came out, I bought it again. GT3 was a wee bit smaller, but a helluva lot better looking, but still had all of its Mercedes-ness intact and beat the live stuffing out of any of its competitors, so I was really happy with it, too. Then they announced Merc mark IV, so I bought that. Great looks and almost as much flair and what not like the Mark II, so I had a blast with that for a long time and if the promises for the mark V were to believed it would be the über-Merc, the best thing since sliced bread.
When I bought the Mark V, for more cash than the others before, it looked quite promising, but only 20% of the switches and gauges were "premium" and worked properly, the other 80% were labeled standard and looked like they were installed in Albania, during the war, oh and not all of them worked properly either. After spending a while with my new Mark V, I noticed that much of it wasn't quite finished yet and every few weeks a mechanic comes round and "updates" my car. Couple of weeks ago one of the mechanics removed the button that turns off the ASM system. Obviously the manufacturer decided that it's better for me to leave it permanently turned on. And to sum it up, on the way to work I was blown into the weeds by a Microsoft KIA Rio three cylinder Diesel, making me realize that I paid Mercedes money for a Daihatsu crapwaggon with a fake mercedes badge nailed to it.
THAT's GT5 and I'm not impressed...
Games like GT4 are a GREAT value. GT5 may not be that kind of great value, but if it's providing you with hours and hours of entertainment, it must be some kind of good value to you.
Yes it is of some value. Exactly about 20% of what I had to pay for it. You say yourself, that it isn't the value for money of GT4. Over here in Europe, a product that offers less value for more money is usually called inferior.
Back to 'the grind' as it were. It seems that everybody has their own definition of it. Is it a grind to do a race a second time after changing suspension settings on your car? See, whenever I change something, it's not a grind to me. It's only a grind when I go into a race for the purpose of advancing in the game. It's these arbitrary targets that cause the problem. Instead, I'd rather approach it with the purpose of advancing my tuning on a car, or my driving. So, I don't ever try advancing in the game, because that will take care of itself.
You got to be kidding me!

What you suggest is that I run a race, change some tuning setting and run it again, then change something else and run it again. Damn your life must be a thrill if you're entertained by that! Don't leave the house, the sheer thrill outside might kill you. Sorry, but if I watch a film, then change the setup by switching the audio from German to English or by switching from Bretzels to Pringles does NOT make the film any more entertaining, when I watch it a second time. And the fact is, to stay with the analogy. Once you reach the lower 30s levels, you're forced to rewatch a film several times, only to "advance" enough to be able to watch a new one. That's called a grind.
Somebody said it was a rough grind from 35 to 40, because it's the same amount of experience to go from 1-35 as it is to go from 35-40.
All that means is that if you do exactly what you did during 1-35, ie, you played the game over in its entirety, you'd reach 40th level. Is playing the game twice such a horrible grind, when you're discovering new stuff on the second time through?
What new stuff did you discover when you ran the Vitz Cup for the second time? What new discovery did the repeat of the Mini challenge bring along? Or what new amazing insight did it give you to bore yourself through the Miata 4-hour enduro for a second time.
Oh, and while we're at it. Could you give us uncreative, unimaginative, obviously unappreciative minions some pointers what to do with such amazing cars as the 2CV, Nazi-Kübel, Subaru 360, Daihatsu Midget, VW Beetle and somesuch, that we won for playing the career earlier. back in the olden days we used those for the one-make races, but somehow I can't find them in GT5....