People who practice calligraphy will have a temperament that others don't have after a long time. However, this temperament is different for every calligrapher. Arrogant and straightforward people are generally firm in style, and smooth people often deal with it everywhere in their arms, so my personal opinion is that you can really see a person's character.
Calligraphy lines also look at a person's personality, which can be seen from the following points: urgency, weight, cleanliness, font and so on.