Hello, I've been viewing these forums for quite some time now. I've been reading some very interesting threads and decided to post some of my personal opinions on this game, which I like a lot.
On the actual topic of this thread, the car I find the hardest to drive in GT5P is the Blitz Dunlop. With professional physics and assists off, the car only oversteers, even on the smooth bends of the High Speed Ring. I understand it is a drift car, so therefor it has a natural tendency to get sideways, however, being that I'm not so much of a drifter but rather a follow-the correct-racing-line kind of racer, I find it very difficult to keep the car straight. I've even stopped using it in races because I have to way too moderate with my acceleration to prevent oversteer, causing me to lose too much time against the AI which somehow manages to drive it perfectly smooth and much faster as if the issue wasn't even there.