12. Signs You’re an ISTP. the most mechanically-inclined type. The ISTP is probably the most mechanically-inclined of the 16 Myers-Briggs personality types. Although they aren’t necessarily fixing cars or building robots. ISTPs are natural “makers” and have been nicknamed “the virtuoso” personality. ISTP traits include a penchant for problem-solving, cool pragmatism, and eager curiosity and If you relate to most of these signs, you might be one.