Lol! Yeah, I was going to say, he keeps a toothbrush in his glovebox to clean his air conditioning vents! XD
I agree with what you have for James and Jeremy. I think Hammond is an ESFJ.I realize that I am raising a zombie thread here but screw it. Top Gear is my favorite show. I have put some thought into their types.
Clarkson = ENTJ
He definitely has an "in charge" interaction style. He shows strong use of Se but I think it is tertiary. It makes sense that his tertiary function would be heavily used because of how wildly extraverted he is. Look at the way he moves around. That is not the way an Se dom moves. He seems very Te dom and I don't detect any Fe from him.
Hamster = ????
I can't decide what he is. He seems to use Fe but I have a hard time identifying Fi vs Fe in a lot of extraverts. I've got it narrowed down to a "getting things going" interaction style. That puts him at ENFP, ENTP, ESFJ or ESFP. Can't decide.
May = INTP
Some people have suggested that he is an ISTP. There is no way an ISTP would get the nickname "Captain Slow" (barring irony). You could make an argument for ISTJ because he shows STRONG use of Si. There again, I think it is tertiary. I also think this interaction style is more "behind the scenes" than "chart the course".
The Stig is only a racing driver who doesn't have the mental capacity to use more than a couple functions. Se and Ti are obviously those two.