So, perhaps this one is a bit of a no-brainer...but I thought I would present them in a clear, succint format.
--More focused on refining, preparing and / or «aggrandizing» own ideas / theories
--Less attracted to outside ideas, can be quite dismissive of them ... in truth, they prefer ideas imbibed with the subjective element of their minds...they're less in tune with the Zeitgeist...
--More introspective ... usually admit to being brooding, intellectually-charged loners, familiar with the «dark side» of human life.
--Usually prefer one-on-one discussions...also tend to be more comfortable / competent as experts in a specific field, often one that is unfamiliar to the common person.
--Asocial tendencies...in failure, usually blame the «inevitable stupidity of the mob / humankind».
--More focused on presenting / selling ideas and theories.
--Less attracted to esoteric ideas, usually dismiss them as non-sense...prefer to discuss and troubleshoot ideas that are «out there»...more in tune with the Zeitgeist.
--More objective ... usually have no problem describing themselves as people of affairs, they see themselves as the true «rational optimists».
--Usually more stimulated by fast-paced, group-oriented discussions...usually enjoy expressing erudition and competence in various fields.
--Anti-social tendencies...in failure, usually accuse people of wasting time nursing their wounds and/or being too security-conscious to contribute to grand causes.