V8 supercars is a wonderful championship, fast cars, great engine noise and a very good mix of sprint, long and endurance races.
BTCC very ordinary looking cars but it is a championship which never fails to produce great racing and the rules seem to work very well.

WTCC and DTM both very different, one wants to be a reference and the other as said before is a glorified series for big cars with lots of wings and winglets, in my opinion both extremely boring.