Bluewing made a comment I found interesting in another thread, about how INTPs live for the pursuit of higher understanding, and INTJs for seeing their visions realized.
This cuts to the core of it for me. All of the planning, scheduling, chess-mastering, etc. related with my type is incidental. I don't think that schedules and deadlines are inherently super-keen. I don't bust my hump because I think it "builds character". All MBTI aside, my life premise is simple: see my ideas to fruition.
My question, then, becomes: Putting all MBTI terminology and what have you aside, what is your life premise? Why do you do it?