It seems that the good girl, bad boy trope may be more than the plot line to your favorite rom-com. According to Gretchen Rubin, the author of The Four Tendencies, people can be divided into four personality types (tendencies), and the best romantic matches are made between what Rubin calls "obligers" and "rebels," reports Business Insider.
In order to categorize people into each of the four personality types—obliger, upholder, questioner, and rebel—she asks the question, "How do you respond to expectations?" (You can take Rubin's quiz to find out which one matches your personality type.)
The obliger will meet outer expectations, but they are not always able to meet the expectations they set for themselves; they require accountability from others. Upholders are characterized by their ability to meet both inner and outer expectations; they're able to accomplish what others expect of them and meet their own expectations for themselves. Questioners can meet their inner expectations, but they are unlikely to do something just because someone else wants them to; they only act when it makes sense to them. Then there are the rebels, who are resistant to inner and outer expectations.
The odd thing is, based on anecdotal evidence Rubin gathered from conversations with real couples, rebels and obligers tend to make a great pair. "There's a deep affinity between obligers and rebels. Both have this resistance to inner expectation, and this gives them this feeling that the world is pushing on them and they want to push back," she says.
To give you an example, Rubin explains that a relationship between an obliger and a rebel might go something like this: If the obliger complains about their demanding family, the rebel might remind them how much they do for their family and suggest jetting off for the weekend to do something for themselves.