I love the circuit experiences. Sticking with each one until I have golded each part and the whole (and get a gift car and track unlocks for it) is a real challenge and I'm learning the circuits so much better. The missions are also much more of a 'thing' than first glance would imply, they are many and varied and some are quite large. The time penalties and/or dqs for hitting things means the old GT 'drive by bouncing off everything' thing just doenst happen, and the game is more engaging as a result.
I am playing online every night (including the two 'FIA' seasons currently on) and it is a lot of fun. Matching makes sure you race against people in a similiar group, and as said the dirty trolls will end up with their kind alone.
Obviously the player run 'lobby' matches are not thus organised, but Ive found them actually pretty good.
I really dont have anything bad to say about cars, tracks or handling etc. I have ONE issue which is that the online penalty system still needs work. it can fail to detect that a guy pushed me wide in the gravel at 200+ at the top of the hill on Dragon in the FIA cup, ending my race effectively, but penalises low speed stuff and obvious bumps which dont really do anyone any harm pretty hard.
Remember, post those gamertags for psn and we can all be in each others lists. von_shaunus here