Evidently, handwriting analysis is scientific enough to stand up in court, but only as a means to detect forgery. This is known as "forensic document examination," and it's a bona-fide science. Not so graphology, the form of handwriting analysis that attempts to link handwriting and personality. The Skeptic's Dictionary debunks graphology, but it also debunks MBTI, so let's go forward at full steam with intellectual dishonesty here and link the two!
Have you noticed similarities between your handwriting and others of your type or temperament? Differences between your handwriting and others that don't share your type or temperament? Feel like scanning in a sample so we can look for patterns?