Something apart from the engine sound in Gran Turismo that annoy me is the gear changing sound, because all cars pretty much shift gears with no delay. I remember this was not the case in Gran Turismo 3 when it actually was a delay when shifting gears (on "regular" cars), I think this is a huge steb backwards.
However in GT5 one of few exceptions was the Lexus IS F which actually sounded like it did in real life when shifting and I always enjoyed driving this car because of this. (plus the engine also sounded pretty close to the real thing)
Anyway... now in GT6 they downgraded the gearshifting sound of the IS F so that is sounds exactly the same as all other cars and deleted its unique-ness when it comes to this, another step backwards PD!!!!
Here's a few videos showcasing what I mean:
GT5 - CORRECT
GT6 - NOT CORRECT
Real Life
So, anyone else know more examples like this, that has been downgraded/upgraded, or has a different gearchanging sound in general?