I too really like this seasonal. Like a lot of others, I used the Clio set to 452 PP, with sport hard and had a blast! Toughest was Autumn Ring, passing 11 cars in 3 laps was a bit tough for my poor driving skills but I did manage to get into first at the last corner and won by 0.8 seconds.
I also had challenges on Mt.Aso as a couple of the AI's ended up totally side-ways right in front of me, one on each of a right and left turn. A couple of t-bones, and dropping to last place, but still managed to pull out the win with just over 1 second margin.
I have done them all twice with the Clio, now to want to try something else, like my Hommell!