Interesting how Feynman can be inspiring people long after his death.
He sounds as if he likes to talk about himself rather too much, so I wouldn't be surprised if there was a fair amount of exaggeration in his prose.
That said, if I made a list of dead people I'd like to spend a day with if I could, he'd sure be on it (as an aside, who [else] would you add to such a list?).
And he could be serious, too: despite being an outspoken atheist, he deeply loved his wife to the extent that he wrote a letter to her after she had passed away.