Everyone is born with a temperament, they could be action oriented, analytical, focused on relationships, supportive, or many other things.
There has been studies and there are 4 categories nearly all human temperaments fit into and understanding these 4 will help you find the best employees for specific , best friends, and even best lovers. I’ll tell you about the 4 temperaments more in detail in another writing.
You know who Romeo and Juliet are right? What happened to them?
Yep, they killed themselves in a tragic way. They were very similar temperaments and similar temperaments do NOT do well in the long term in a relationship.
Now, if they were the opposite temperament, they would make up for each other’s weakness and be even more attracted to each other. Personally I think the story is meant as a warning to people to NOT seek out someone similar to ourselves.