Using the Big Five, a Conscientious individual would agree to these statements, and would be found to fit them by others (with some grammatical manipulation, of course):
Am always prepared.
Pay attention to details.
Get chores done right away.
Follow a schedule.
Am exacting in my work.
Do things according to a plan.
Continue until everything is perfect.
Make plans and stick to them.
Love order and regularity.
Like to tidy up.
On the other hand, they would not agree with these statements, and others would not find them to be a good fit (again with some grammatical alterations):
Leave my belongings around.
Make a mess of things.
Often forget to put things back in their proper place.
Shirk my duties.
Neglect my duties.
Waste my time.
Do things in a half-way manner.
Find it difficult to get down to work.
Leave a mess in my room.
How Conscientious is Rational? Can someone with ADHD or executive dysfunction be Rational, or is their seeming Irrationality actual Irrationality?
Is informational metabolism predicated on how someone functions, or can you simply describe what someone sees and how they act without reference to classical orderliness/extraversion/friendliness/moodiness/sophistication?
Given some of these traits are culturally sensitive, can a Rational from one culture look like an Irrational in another, and vice-versa?