After having lived in Korea for a few years I can witness that they are indeed extremely emotional. However, their emotions are tied to their place and representation in the social fabric as opposed to being a show of self as it is here in America. Hell hath no fury like a Korean scorned.
I also find it very interesting in that they are very intelligent, but fall prey to the Dunning-Kreuger effect constantly. From cradle to grave they are on a track where it is so planned out that meaningful tokens can be placed along the way, almost like a game where at age 14 you can win the High School prize, and if you soldier on you can win the University prize, etc. There is no reason to analyze the why, only that you become the to 1% or learn to justify your place and live with the relative shame [this all depends on your families initial standing, as well as which particular common human personality your family has in it's matriarch/patriarch].
They lack an ability to plan competently, constantly chasing a pie in thy sky and never following through, and despite them having a strong system of interpersonal checks and balances they are probably the most disorderly people I have met.
However, and this is not spoken lightly, you will have a very difficult time finding a more tightly knit society on the planet other than the Koreans. Their lack of individualism allows them to act en masse at
the drop of a hat. Every benefit creates a drawback it seems.