I am an INTJ and these descriptions sound like me.
INTJ s are analytical problem-solvers, eager to improve systems and processes with their innovative ideas. They have a talent for seeing possibilities for improvement, whether at work, at home, or in themselves.
INTJs have a hunger for knowledge and strive to constantly increase their competence; they are often perfectionists with extremely high standards of performance for themselves and others. They tend to have a keen interest in self-improvement and are lifelong learners, always looking to add to their base of information and awareness.
INTJ s live in a world of abstraction and theory, and may sometimes be absentminded in their preoccupation with concepts. Often intellectual, they enjoy analysis and complex problem-solving, and are much less comfortable with the illogical and unpredictable nature of other people and their emotions. They may not want to bother with people who they do not perceive to be their intellectual equals.
INTJs are perceptive about systems and strategy, and often understand the world as a chess board to be navigated. They want to understand how systems work, and how events proceed: the INTJ often has a unique ability to foresee logical outcomes. They enjoy applying themselves to a project or idea in depth, and putting in concentrated effort to achieve their goals.
INTJ in the Population
INTJ is the third rarest type in the population, and the rarest type among women (with ENTJ ). INTJs make up:
2% of the general population
3% of men
1% of women
Popular hobbies for the INTJ include reading, cultural events, taking classes, appreciating art, computers and video games, and independent sports such as swimming, backpacking, or running marathons.
Famous INTJs  include Hillary Clinton, Al Gore, Bill Gates, Dwight Eisenhower, Alan Greenspan, Ulysses S. Grant, Stephen Hawking, John Maynard Keynes, Ayn Rand, Isaac Asimov, Lewis Carroll, Cormac McCarthy, and Sir Isaac Newton.
For more information: Famous INTJs 
Research on INTJ
Interesting facts about the INTJ :
On personality trait measures, score as Discreet, Industrious, Logical, Deliberate, Self-Confident, and Methodical
Among types least likely to suffer heart disease and cardiac problems
Least likely of all the types to believe in a higher spiritual power
One of two types with highest college GPA
Among types with highest income
Personal values include Achievement
Of all types, least likely to state that they value Home/family, Financial security, Relationships & friendships, and Community service
Overrepresented among MBA students and female small business owners
Commonly found in scientific or technical fields, computer occupations, and legal professions
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