Reading the descriptions of Merry vs. Serious, it seems that:
Merry types speak like this: 'this is what I think...', while Serious types are more: 'the correct way of doing this is...'
Also, it says for Merry types, 'the ''name'' behind the person is of secondary relevance' - I think this means that Serious types treat a name as a fact about a person, while a Merry person is more inclined to know someone by their unique personality or whatever. The description makes it sound as though a Merry person doesn't know where they end and the next person begins - the name of a person isn't important, and a person's identity is very much in flux - for Serious types, someone's identity seems more set in stone. The description says that Merry types have no rituals involved in getting to know somebody - i.e. Merry types identify with others quickly and easily, as though they share the same emotional background (i.e. melting pot). Serious types seem more impersonal and detached from the emotional background - they see themselves as a distinct entity from others, and yet they see everybody as operating under the same rules (the serious types are described as 'the objectivists'). Merry types are more inclined to agree to disagree - the description has the quote ''Well you say it is like that but I disagree'' - they are subjectivists, and are more inclined to accept that other people have different points of view (though of course they might not like it
) - for Serious types, it says, 'they suppose others can have their views, hold their position, but at the same time, do not consider that any action can be viewed true or false depending on their point of view'.