Personality - Does Understanding it Help?

Every so often you wonder if your personality is right for the job or work environment you're in. I've taken the Myers-Briggs test a couple of times. The following is kind of a summary of how I read the test. I wonder if this is really how people see me?
My personality starts by being internally focus, where I take things in primarily via my intuition. I than switch my focus to external, where I deal with things rationally and logically. My modes of focus are almost equally balanced.
I enjoy the world of ideas and strategic planning and have lived in it for the last twenty years. There is always a world of possibilities where I see all sorts’ of challenges and I want to be the one responsible for overcoming them. I see things from a long-range perspective and am usually successful at identifying plans to turn problems around. I am tireless in my efforts on the job, and driven to visualize where an organization is headed.
I have a drive for leadership, as a youth I was often place in positions of leadership and still seek leadership positions today. My leadership is well-served by my quickness to grasp complexities, ability to absorb a large amount of impersonal information, and quick and decisive judgments. I am a "take charge" person. I constantly scan the environment for potential problems which I can turn into solutions.
When I’m in a leadership role, I tend to be quite effective because I work hard to objectively see the reality of a situation and can still adapt to change when things aren't working well. I am always scanning available ideas and concepts and weighing them against the current strategy to plan for every conceivable contingency.
I spend a lot of my energy observing the world and generating ideas and possibilities. My mind constantly gathers information and makes associations about it. I work hard at being insightful and usually am very quick to understand new ideas. However, my primary interest is not understanding a concept, but rather applying that concept in a useful way. I do not need to follow an idea as far as it can possibly go; I only need to understand it fully. I really need to come to conclusions about ideas. Once I have my conclusion, my need for closure usually requires that I take some action.
I value intelligence, knowledge, humor and competence and typically have high standards in these regards, which I continuously strive to fulfill. To a somewhat lesser extent, I have similar expectations of those around me.
I dislike seeing mistakes repeated, and have no patience with inefficiency. I can become brutally honest and may become rather harsh when my patience is tried in these respects, because I’m not naturally tuned in to people's feelings, and generally don't believe that I should tailor my judgments in consideration for people's feelings. I have difficulty seeing things from outside my own perspective. I tend to have little patience with people who do not see things the same way as I do. I have to consciously work on recognizing the value of other people's opinions, as well as the value of being sensitive towards people's feelings. When I’m not consciously working on being sensitive towards people, I can become forceful, intimidating and overbearing.
People tend to grant me a tremendous amount of personal power and allow my presence to affect them, which works as a force towards achieving my goals. However, this personal power is also an agent of alienation and self-aggrandizement, which I have to work hard to avoid.
I tend to be a very forceful, decisive individual. I generally make decisions quickly, and can be quick to verbalize my opinions and decisions. Every day there are countless choices that I make without much thought. I tend to apply rules and copy solutions from my own or others past experience rather than solve every problem I encounter on a daily basis. I would have difficulty surviving if I had to apply problem solving techniques to every decision I faced. Some will call this intuition; I prefer to think of it as the ability to recall all that impersonal data. Either way, as I have gather experience and education, I tend to make fewer decisions too hastily, because I have a better understanding of all the issues and possible solutions. I still spend a lot of time thinking and developing understandable and rational system for new projects or ideas. This may isolate me and I can lose interest in other people's thoughts or feelings. It is not easy for me to express internal images, insights, and abstractions. The internal form of my thoughts and concepts is highly individualized, and is not easy for others to understand. However, I’m driven to translate my ideas into a plan or system that is usually readily explainable.
Although I’m not naturally tuned into other people's feelings, I frequently experience very strong sentimental streaks. Often these sentiments are very powerful and I hide it from general knowledge, believing the feelings to be a weakness. Because the world of feelings and values are not where I naturally function, I may sometimes make value judgments and hold onto submerged emotions which are ill-founded and inappropriately developed.
I enjoy interacting with people. I’m energized and stimulated by public situations. There's nothing more enjoyable and satisfying to me than having a lively, challenging conversation. I especially respect people who are able to stand up to me, and argue persuasively for their point of view. There aren't too many people who will do so, however, because I’m a very forceful and dynamic presence who has a tremendous amount of self-confidence and excellent verbal communication skills. Even the most confident person may experience moments of self-doubt when debating a point with me.
Other people may have a difficult time understanding me. They may see me as aloof and reserved. Indeed, I’m not overly demonstrative of my affections and will not give as much praise or positive support as others may need or desire. This doesn't mean that I don't truly have affection or regard for others, I simply do not typically feel the need to express it. Others may falsely perceive me as being rigid and set in my ways. Nothing could be further from the truth, because I’m committed to always finding the objective best strategy to implement my ideas. I’m usually quite open to hearing an alternative way of doing something.
I like my home because it is beautiful, well-furnished, and efficiently run. I’ve always placed a lot of emphasis on my children being well-educated and structured. I have worked to develop a congenial and devoted relationship with my spouse. My wife survives with me because she has a strong self-image and is also a thinking type. She has very well-formed ideas about the way things should be and is not shy about expressing her opinions
I’m ambitious, self-confident, deliberate, and a long-range thinker. I picked my profession to find enough challenges which involve organizing and strategic planning. I dislike messiness and inefficiency, and anything that is muddled or unclear. I value clarity and efficiency, and will put enormous amounts of energy and time into consolidating their insights into structured patterns.
I get the Big Picture and am driven to synthesize concepts into solid plans of action. I have good reasoning skills and the means to accomplish my plans. I have not had a problem meeting my career or education goals.