I took this test for the Big Five twice at an interval of two years. The Big Five traits have been discussed on LW, mostly in a favorable light.
My scores were as follows, showing quite significant variations:
As a result I have updated quite a bit away from lending much credence to this particular self-administered Big Five test; either the test itself is flawed, or self-administration in general doesn't ensure stability of the measurements, or the Big Five theory has a problem.
This test seems to be measuring your self-image, not your behavior.
Consider the difference between asking, "Do you see yourself as someone who starts quarrels with others?" and following the person around for a week and seeing if they start quarrels with others.
I'd like to know how well-calibrated people's self-images are. It seems to me that for some variables, many people's self-images are very poorly calibrated.
If it's worth saying, but not worth its own post, even in Discussion, it goes here.