In your opinion, what types would you classify as merry or serious, based on your own experience. You can classify them any way you want and you don't have to include every type if you don't want to or don't feel confident doing so (not enough experience).
I will go first. And I don't care if you don't agree, I just want to hear your own opinion (or attempt to convey your experience through transmuting it into how you interpret Merry/Serious in the types) about Merry/Serious.
Wants to be Merry
Attempts to be Merry
Attempts to act Merry
Attempts to feel Merry
Attempts to produce Merry
Critical about others intentions/behaviors/competence
Wanting to avoid economical and political ruin through their rewarding intellectual competency
Unabashed distrust in the reasoning or opinions of other people
Wanting to avoid boredom of menial societal work through their rewarding practical competency
Wants to be Serious
Wishes to have their command of the environment (people included) mastered and rewarded for it
Wishes to have their unique curiosity rewarded by society
Wishes to gain security of community and prosperity of wealth
Wishes to gain prosperity of wealth and security of political interest