The game City Rider has everything you need. Huge amount of cars with different physics and driving characterstics, three big maps including two bustling cities and one countryside map, cool graphics with authentic destruction model, and this is just beginning. You can change between certain driving styles, and burn your tires like a real drift king, or race as a pro, or turn off all driving assistants and enjoy the simulation mode which comes with one of the most amazing driving challenges up to date. Explore interesting places in the city, or head to the mountains behind the city, and test the suspension of your car whether it is working properly. Absolute freedom and amazing cars, that sounds to me like ideally spent time... Have fun.