Great thread! I also don't "hate" any corners per se but there are many i've only really learned quite recently, even when they were in GT4 or earlier.
I can usually scramble around the last Fuji section but I know i'm not taking the ideal line for most of those bends, that said, I do often find I can make up some ground there so must be doing something right, especially that kinda long sweeping right before things start getting more complex, the AI cars don't seem to take it all that fast and brake very early for the tight right that follows.
I think Fuji is particularly tricky because so many of those corners are blind, uphill or on crests so you really have to predict when to turn in. Personally I found the older layout (layouts? I forget) of Fuji in GT4 a lot more fun, less of the kinda random run-off areas too, much less confusing.
Great to see the Jackie Stewart clip (wow he had a very high voice then), he gets the Carousel right of course, you really have to take it pretty slow, and stay tight on the inside, more cambered part. Don't nail the throttle until you are almost lined up straight for the next section. The key is not hitting the "lip" between the inside "bowl" part with the chevrons and the outer flatter part, at least not until you have pretty much left the corner behind and it's flattened out. If you do the car unsurprisingly totally loses grip and you'll be heading for the barrier.
Only corners which still catch me off guard (as opposed to ones that are difficult but I can't complain when I mess them up) are the right hander before the tunnel towards the end of the shorter version of Eiger Nordwand, which I enjoy, but it can be really tricky getting good speed into the tunnel, as it rises and turns sharp right, and a lot of cars oversteer and turn in on themselves, hitting the inside barrier (the Alpha 8C for example in that special event).
Aside from that, most of the course maker tracks in the seasonals have at least one nasty bend, but it's just a case of learning the track usually, and giving them a little respect.