I have a friend who typed (interwebz) INTJ, but I SWEAR is an ISTP. He's a builder. Not an architect, but a builder. He's almost... childlike, and has always built things (Built a hoverboard). He enjoys theory, to a degree, that degree being that he wants to put it into the real context, and, if possible, build a model. He is a wannabe artist, a magician in training, and is currently infatuated with books on theoretical physics (flawed explanations of hyperspace and all that)