The Back Seat Driver
They ask you to take a very specific route as soon as they get in the car. Any traffic along the way will upset them, even if they do not need to be at their destination at any particular time. Some will encourage the driver to illegally pass other vehicles in order to get ahead by 30 seconds.
Pros: These people are typically ready before you get there, and are quick to get out of the car. Typically a couple, but if it is a group of people, they will generally keep to themselves.
Cons: The Back Seat Driver will be frantically looking out the windows, sitting on the edge of the seat, and leaning into the front of the car to get a better view of the road and make sure you aren’t “taking them for a ride”. Despite his/her knowledge of the route, keep GPS open so you can offer alternate routes to speed up the trip.