ISTp's are fit, physical and present. I'm constantly out of shape, detached and sometimes absent-minded. I mind my own business and I only confront people verbally and intellectually. I spend way more time over-analyzing the crap out of trivial things (Ti) than developing or maintaining relationships (Fi). ESFj's are my duals because they have the ability to feed me and put up with my emotional retardation. They take care of my physical and emotional well-being while I structure their brains and help them develop their potential.