They are unflappably logical and rational, are excellent decision makers and, because of their passion and forthright manner, can sometimes come off as a little intimidating to others. They tend to be private people who do not dwell on subjectivity or emotions. In spite of their similarities, they perceive the world differently and will thus approach many situations differently. An ISTJ examines the minutia of a situation and prefers tried-and-true methods, opting for traditional solutions. An INTJ is just the opposite. They see the big picture and prefer new ideas — the more creative and outlandish, the better.
ISTJ and INTJ: Compatibility, Love, Marriage and Romance
ISTJ Personality: At Work, in Life, and in Love - PairedLife - Relationships
ISTJs are loyal and dependable individuals. They value integrity and see it as their duty to do what they believe is right. Their organization and conscientiousness allow them to define, plan, and implement their objectives. Once they decide on an objective, they will work tirelessly to ensure its completion. ISTJs highly value facts. Storing and organizing an immense number of facts within their minds is their forte. They are typically quiet and reserved, working most efficiently alone.
ISTJs are not very emotional people, and they tend to use their common sense and intelligence more than their feelings. Most ISTJs want to find a long-term romantic mate with which to spend the rest of their lives. ISTJs seek out partners that will commit to them and stick with them.
The ISTJ's word is as good as gold, and they honor their commitments faithfully. They believe that to do otherwise would be nothing less than a breach of honor and trustworthiness. Consequently, they take their vows very seriously, and once they have said "I do", that means they are bound to the relationship until "death do us apart" or otherwise. ISTJs are driven to fulfill their responsibilities and duties, and will do so with tireless effort.