I've had travel sickness since I was a kid so I've always sat in the front. Only recently when in the car with many friends have I had to sit in the back and I find I am always being a 'back seat driver'.
I don't like not being in control. I don't mind being in the car with my dad or my brother but my mates I always feel a bit uneasy.
Perhaps I am more critical of others as when I am a passenger I am constantly watching them and everything they do. One thing is some of my mates (yeah strangely more than 1, not sure how they manage!) have an odd thing where for some reason they end up steering left if they put in a cd or something, or even sometimes when changing gear they steer in the direction they just put the gear stick. Something that puts me in panic mode and I do often reach for the wheel and end up saying 'woah woah woah watch it'.
I don't think my mates like it when I do it at all, but I guess now I am driving I am not as trusting as a passenger. If I was a kid, as long as I was sitting in the front I'd be happy lol.
All I know is I wouldn't want to be a driving instructor or examiner.