Since these traits are binary, most people fall somewhere between the far ends of the spectrum for each trait. Ties do exist, but the inclusion of more questions tends to determine which side you are truly on. As with most statistical analysis, the more questions you answer, the more precise your results become. A free test is available here; this particular test has 55 questions and takes about 10-15 minutes to answer. Far more elaborate tests are available, but typically these are paid and administered by licensed Myers-Briggs instructors.At any rate, Myers-Briggs has helped me in numerous ways. Franklin Delano Roosevelt used to have his secretary research the interests, family, and background of key persons before a meeting; instead, I do a quick run-through in my head of whether I think this person is extroverted or introverted, intuitive or sensing, and so forth. Typically, I get this down to 1-3 likely personality types, and then I can research the best ways for my personality type to convey information to theirs. This may sound manipulative at first, but it is merely used to determine the best way to present the information to a given person, no more than a bar graph should be used to present a comparative list of categorized numbers. And I've found it is an effective way to find better methods to communicate. Myers-Briggs has helped me immensely, giving me a way to be compassionate to the tendencies and preferences of others in an almost-quantitative way. In general, I've found that far more men than women are thinkers than feelers; more men will respond to a logical, rational, emotionless argument than women will. (Perhaps Thinkers, not men, are from Mars.) An intuitive, particularly a well-educated one, will be insulted or at least mildly annoyed if you present well-known factual information to them. Conversely, a sensor will actually prefer you to spell out the minutiae, feeling that this is a more complete argument. And it gets more complex: intuitive feelers have the best heart-to-heart chats with other intuitive feelers, but more intellectual stimulation with intuitive thinkers. There are books upon books of this type of research -- I can get really into it. Granted, there are always people with whom you are more comfortable and compatible with than others. That goes beyond improving communication and under the beachhead of person - the morals, values, ideals, thoughts, feelings, and experiences that make us whole. Certainly more than a simple cluster of personality traits. But Myers-Briggs does help, particularly in direct business communications. For romantic relationships, it's a little more complex. Theoretically, any person can have a successful relationship with any other type, but some interactions are naturally easier and hence certain combinations are more commonly found in the population than others. With that said, Keirsey maintains people should be in romantic relationships with those who are the same on intuition or sensing, but opposite on everything else. Other psychologists theorize the best relationships are between those who are the same on intuition/sensing and thinking/feeling, but opposite on the others (extroversion/introversion and judging/perceiving). I, for one, am somehow always attracted to the same type (NT), which goes along with Keirsey's theory. I find it odd - despite the fact that these persons are found in fields disparate from mine (computer science, physics, mathematics) and relatively rare in the population, that's just what happens. I've even tried dating outside this type, but inevitably, I'm just not as attracted. Go figure - I guess my dream man is more Richard Feynman than George Clooney. Yet, what Myers-Briggs has done for me is even more important than aiding in communication with others. Myers-Briggs study has helped me understand (and ultimately accept) myself more. After testing, I have learned that I was an ENFJ until late last year, and then somehow I became INFJ. (Maybe I was socializing too much and got tired?) I read on another INFJ's blog that the INFJ designation felt more like a "diagnosis" than a "typing," and in some ways, this is true. I often joke that I don't know what I'm thinking until I write it out - I swear, my IQ is thirty points higher on paper than it is verbally. I thought this made me weird, but other INFJs muse on the same thing. I prefer to have one other person with me in a social situation, whether a significant other or a best friend, and I tend to have more depth than breadth when it comes to my friendships. Yet I care deeply about others, and I am sensitive to their opinions. I think mostly in terms of people, but love concepts and statistics and trivia and facts. Interestingly, Myers-Briggs has predicted all of these things about me. And then some. Granted, this system will not work for everyone, at least not without the help of a Myers-Briggs licensed counselor who can help you navigate the waters. Some people will inevitably find themselves between types without one. Medical school training in psychiatry courses helped me immensely, but I am confident that anyone who wants to learn Myers-Briggs can, given the right books and tools. Anything by Keirsey is probably the most comprehensive, whereas overview guides are probably the simplest place to start. And you can always just dive in with a free quiz like this one and then search Google for information about your type. Bottom line: Myers-Briggs is a fun exercise, particularly if you are interested in improving communication with others or understanding yourself a little better. For me, it's been an almost transformative experience, as it has run alongside growing into myself as a woman in my late 20's, ever-increasing in acceptance, respect, and understanding for myself and others. If you're the kind of person who is committed to constant personal growth, I suggest you check the system out.