Where to start?
I've never finished the game and yet I've restarted five times...
I use the AI as brakes (accidentally sometimes on purpose when the red mist drops, I seriously feel so guilty about this that after hitting someone I'll pull back behind them or wait for them to get back on track-sometimes..)
I sometimes sandbag in qualifying with a very fast car so I can have the pleasure of blasting past the other cars into the first corner ( I can just imagine them shaking their fists at me, 'I knew it, I knew it'.

Especially with a standing start, AWD car and nitrous.
Actually showing up to a race with a grossly overpowered car-I'd like to apologise again for turning up to the Sunday Cup with my 911hp GT-R....