For me it has to be either Bathurst or Long Beach. I remember Bathurst from a couple games growing up and hating it and Long Beach always seemed like just another boring street circuit to me. After driving the tracks on Forza, Rfactor and Race 07 they are easily 2 of my favourites in the world. I don't know what it is, maybe the narrow walls punishing you for small mistakes, but I love racing around them