When I read his book I got the distinct impression that he grooms anecdotes. That is, he will subtly manipulate a situation (or the recounting of it) in order to make a better story. His stories are highly entertaining as a result.
A lot of us do this to some extent, don’t we? I mean, I’m no Feynman, but I have done some things thinking, if this works out, it’s going to be a great story. Sometimes there really is no other good reason for doing them.