It wasn't my list, it was the sum of the observations made by the Master Chief based on his 30 plus years experience.
He pointed out that the type of art a person chose said a lot about their personality. He also made it clear that while people can't be pigeon holed we could use the chart as a primer to further our own studies of people.
Judo people tend to be cool headed and don't start trouble. IE:They don't hear someone discussing their art and rush over to belittle everyone else's choices.
Boxers tend to be a little more outgoing hence more likely to be at the club, the boxer also usually preempted the BS with a quick flurry of punches and left and unless drinking (the club and barracks) usually didn't get into fights.
Wrestlers often have condescending attitudes and think they know it all, add that to a hot head and you find them starting shit with people over nothing, hence the fights in the mess hall. IE: Some people need to add alcohol to become an instant asshole, wrestlers just need to wake up.
Dojo darlings use their supposed expertise in the arts to pick up chicks so they're usually the ones getting their ass kicked in the club or base housing trying to impress the girls.