I noticed Sandra put up her profile from this particular source on her blog while browsing planet humbug.
Here are my results:
Harry Potter Personality Quiz by Pirate Monkeys Inc.
This is a kiersey test. Interestingly this shows me as an INTP, while several years ago I tested as INFP. Have I become more comfortable with logic and rules? This would match my DISC profile, which showed my adapted style becoming more rules-oriented. This masks my natural style of ploughing on ahead without so much consultation with past experience.
... or all personality tests could be barely-refined horoscopes. Horoscopes are ultimately successful because they tell you want you want to hear. Do personality tests simply refine their suggestion of what you want to hear based on a few questions?