Hey spooky good questions
I enjoyed tuning the Group 5 cars the most as for me they are the most enjoyable cars to drive, RAW 👍
The biggest pain is this LMP1 Toyota what im tuning for the LGCS its pain because you have to tune to get the most out of the boost too, this is all top secret tho
I found the new GTE Vette very good as default and feels good with just a few tweaks.
GT3 cars i still like the Z4 best really the car has been fast throughout the patches,
i did love the M3 but that seems to have gone of the boil (on some tracks)
were as the RUF GT3 seems to have improved with the patches its a very quick car now even on large tracks like Hockenheim GP.
There are still loads of cars im looking forward to tuning like the LMP2s and Formula cars, its just getting the time 👍
Cheers