I love playing this but it does get on my nerves at times, such as when...
People using your car as a braking tool - You are in front of somebody and they are close behind. You brake for the corner at the optimum time and they just keep on coming, knocking you off and then scooting off into the distance. Of course this happens by accident a lot of times and that can be forgiven but some people seem to use this as a regular tactic. Very annoying. I love it when I have a "clean race" with someone, win or lose.
Deliberate ramming - You go to overtake and they just turn into you. What is the point, it isn't life or death, sometimes you win and more often than not you lose. Get over it and play fair.
People choosing the tight and bumpy courses, such as Edinburgh, with cars like Enzo Ferraris or Porsche GT1s - Nobody can handle the power in a race situation, myself included, and it just turns into a bumper car frenzy. The only hope of winning is to get out in front and steer clear of the mayhem.
Not many slow cars are selected by people hosting games - Sometimes it is good to just race the slower cars. I know I can host a game and do what I like but it seems people aren't interested.
Overall my minor whinges don't stop me from playing, I am addicted. Cheers Kai team.