I've been playing the Gran Turismo racing/driving game series (since the first playstation console) due to it's realistic visuals and driving experience.
However, my favourite new feature they added has to be the Photo Mode. It allows you to take photos of your cars in various locations using a virtual camera which you use as if you were there on location (e.g. move around in the environment) and lets you control lens focal length, aperture,shutter speed, etc... (but not very good effects though)