The logical and analytical type. They are especialy attuned to difficult creative and intellectual challenges and always look for something more complex to dig into. They are great at finding subtle connections between things and imagine far-reaching implications.
They enjoy working with complex things using a lot of concepts and imaginative models of reality. Since they are not very good at seeing and understanding the needs of other people, they might come across as arrogant, impatient and insensitive to people that need some time to understand what they are talking about.
Of course, any analysis by a machine of the writing of this blog necessarily includes a lot of things we didn't actually write, but simply cut and pasted from people who are considerably smarter than we are. Come to think of it, that might explain this as well.