I have a triple monitor set up so personally cockpit view is the only view. Set FOV and seat position to make it feel like sitting in the car, with animated driver hands and wheel OFF.
I had to reduce the G-Forces effect down a bit as the camera kept going up and down etc but as I've got a static cockpit and steering wheel, which doesn't move up and down, it was weird having the camera going up and down, and made looking at the track going uphill difficult.
Unfortunately though Project Cars hasn't got proper triple screen support at the moment so there is no side screen angle compensation so it looks fish eyed to me and the cockpit feels way too narrow, but apparently they are working on that.
Here's how it should look though - this is me with Assetto Corsa, which does have proper triple screen support..