It must be the friendlier handling on n00b level but a lot of these corners are easier to gauge in pCars than in Forza where they almost always give me grief. Bus Stop and The Dipper in particular are a breeze for me in this game. Paddock Hill and Blanchimont though...
The Corvette turn at Road America, and the right hander right after. I always think I can flat out throttle that right hander, 95% I go wide, and the other 5% I barely make it. It just looks deceptively fast and makeable full throttle.
Gooseneck at Cadwell Park, it's almost totally blind on the entry and it's a track that you hardly learn because it's used nowhere in the game. If you nail it it's a great corner because you can carry decent speed as the road falls away down the hill.
E- And I forgot to mention the road is so narrow you have to be totally precise.