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1.
Introverted. Sensing. Thinking. Perceiving.

One of the 16 personality types from the Myers-Briggs Type Indicator (MBTI), ISTPs are estimated to make up roughly 4% of the population. Confident and capable, they often stir up excitement and are seen as natural leaders. ISTPs never let rules or bureaucracy get in the way of their goals, for they are true free spirits. Feeling the need to live on the edge, they take on steep risks but deliver results. While they are unlikely to converse loosely, they make up for their reserved demeanor with insightful and witty one-liners. Being thinkers and realists, they are logical and skilled at seizing the moment and making the most of it. Needless to say, they get a lot of pussy.
Walter: What ever happened to Joe? He used to be a badass in high school.
Pete: He's an ace fighter pilot now. Joe's an ISTP, after all.
by lunaticker August 27, 2010
 
2.
ISTP's are the most annoying of all myers brigs personality types. They have no skills whatsoever and must rely on their ability to take from others. They hate INTJ's because we are actually smart and because ISTP's have characteristically small penises. ISTP's are best known for being awkward tools and for having a propensity for interracial homosexual acts.
ISTP's includeTom Cruise (I rest my case)
by Wonder Waffle March 17, 2010