Wearing your patriotism on your sleeve ... or around your neck ... tells me all I need to know.
No, seriously, I have never been wrong yet about a person's character by observing things like that. I know a view as unscientific as that will not go over well with the HN crowd, but perhaps some of us do find merit in body language, and other external "tells".
To be sure, not saying he is not an impressive, and maybe even the best Donkey Kong player — just making an observation about his general trustworthiness in my view.