Agree with most of the previous comments, Matt seems a well grounded, down to earth type of guy. I have chatted with him in the past, and he comes across exactly the same in person, so I don't think it is an act.
Mind you, I also smiled in agreement with Stephen when he remarked on the irony of Matts stated ambitions. The first three quarters of the program was spent explaining the futility of the numbers game, how the size of a fish is irrelevant, that basing success on such things was pure vanity....then went on to say that his only remaining ambitions were to catch a 40lb pike, a 10lb tench...and so on. Very amusing.
However, for me that just adds strength to my initial feelings that the guy is a decent, ordinary human being who just happens to have extraordinary talent. All in all, a nice interview with a likeable man.
Cheers, Dave.