Just wondering what everyone's favorite classes are for racing (both on and offline)
Personally my favourite class is E class. There is so much variety in it, and making a good car for the class is actually quite a challenge. There are no real track machines in the class as stock, so there are no clear advantages, meaning that races can be really varied, you get hot hatches like the Focus ST, 4x4s like the rangey, muscle like the Regal, older sports cars like the silvias, and classics like the DB5. Online there can be great races as long as there aren't the GTi MK II n00bs.
Making a good car for it is bloody hard though, because the class is so small (only 75PI to play with) and you can't really do anything major to the engine or the car. You always have to push the car hard so you get the excitement of being at the limits of a car's handling, but because there isn't much power to spare, people drive with skill so as not to slow themselves down with understeer/oversteer/grass.
My weapon of choice is a RWD prelude, not the fastest car in the world (although it's in the leaderboard top 1% on catalunya ^_^) but it handles fantastically and is hard as hell to crash
Simply put, it's bloody fun!