If you and your boo are both dog people, early birds, and white-wine drinkers, you might deem yourselves compatible. But compatibility has to do with a whole lot more than your preference in animals, sleep schedules, and libations, and that's why the Myers–Briggs Type Indicator is so helpful. The MBTI is all about your psychological preferences and worldview, and IMO, if someone made a dating app that matched people based on Myers-Briggs type, the success rate would be through the roof. There are certain Myers-Briggs personality type pairs who fight without fail, and it doesn't matter if they both prefer chocolate ice cream over vanilla — they simply aren't compatible in the ways that matter.
The MBTI is based on four main factors: Introversion/Extroversion, Intuition/Sensing, Feeling/Thinking, and Judging/Perceiving, making for 16 distinct personality archetypes. The fewer qualities you share with someone, the less likely you are to be compatible (though there are, of course, exceptions to this). Opposites can and do attract, and sometimes, people who share all four qualities are still far from an ideal match. But when it comes to relationship compatibility, here are four Myers-Briggs personality pairs who rarely make for an agreeable couple and should probably keep their distance.