So how about a advanced car damage model?
So if you drive very fast and then crash against something, your entire car should be completely wrecked and you should die instandly like in Mafia. This would make driving much more challenging and interesting. Also cars shouldn't be able to explode or catch fire from crashes alone. Instead they just get crushed.
Its really annoying that you can drive like 300 kilometers against a wall and the only thing which results afterwards is a broken front light and some scratches on the bonnet.