I am an INTJ.
INTJs are analytical problem-solvers, eager to improve systems and processes with their innovative ideas.
Only about 2% of the population is INTJ.
They have a talent for seeing possibilities for improvement, whether at work, at home, or in themselves.
Often intellectual, INTJs enjoy logical reasoning and complex problem-solving.
They approach life by analyzing the theory behind what they see, and are typically focused inward, on their own thoughtful study of the world around them.
INTJs are drawn to logical systems.
You can take a free Myers-Briggs personality test here.