I found this test to be most accurate in describing my personality. It is based on Carl Jung and Isabel Myer-Briggs typological approach to personality. Two points to the test for being based off renowned contributors to the study of psychology. But minus one for being found on the Internet which is just inherently dodgy.
Take it here.
I am an Introverted Sensing Thinking Perceiving, ISTP, kinda person. Here is my favourite line off the profile which I thought described me down to a T.
"...communication also tends to be a key issue, since they generally express themselves non-verbally. When they do actually verbalize, ISTPs are masters of the one-liner, often showing flashes of humor in the most tense situations; this can result in their being seen as thick-skinned or tasteless."
If I had a dollar for everytime I've been reprimanded for doing so, I wouldn't be able to wear my pants! You know... because I would have plenty of dollars... that are heavy... hence the pants dropping.
Alright, so maybe "master of one-liners" was a bit of a stretch.