I flew as a passenger for a while, was quite fun - until MisterE crashed into a mountain. Luckily I jumped out just before. Here's a screenshot of that happening
One thing I'd like is the ability to choose a seat, I wasn't able to sit next to the pilot up front.
The third-person mode eye offset should also be further back to see more of the plane.
The pilot can bring you to copilot position, the pilot menu have the option to select any passenger as copilot