ISTP: The Psycho Vigilante
ISTPs are quiet, unassuming people, who tend to be mechanically gifted but withdrawn and reserved. ISTPs often need a great deal of personal space and "alone time," which may give others the impression that they are aloof; in reality, this time is necessary to hide their secret identities.
The typical ISTP leads a dual life; his outward reserve and quiet masks an inward seething rage at the injustice of life--often, the death of a loved one at the hands of a criminal. In this secret life, the ISTP uses his mechanical gifts to create a terrifying arsenal of bizarre weapons with which to strike fear into the heart of evil. Sometimes, ISTPs may become evil themselves, either slowly over a long period of time or in response to a perceived rejection from the very people they are trying to save.
RECREATION: ISTPs are happiest when they are building and constructing--either new weapons to smite their enemies, or new plots to destroy those who oppose them. They have a very industrial sense of aesthetics, and can spend hours absorbed in the appreciation of works of art such as a 1969 Hemi Cuda retrofitted with missile launchers and ejection seats.
COMPATIBILITY: ISTPs don't often get along well with their extroverted cousins, Evil Overlords and Mad Scientists. Instead, they prefer the company of INTPs, or perhaps their pets. Romantic relationships with ISTPs tend to be drawn-out, tragic affairs, filled with bitterness, longing, and teenage angst. The sex is usually pretty good, however.
Famous ISTPs include Spider-Man and Q.