This was posted by Jaguar back in 2009:
This link takes you to the Harrison-Bramson thinking styles test.
There are only 18 questions. However, the test-taker is required to rate each of the five responses to each question on a scale of 1-5. So it is really like taking a test with 90 questions.
On the other hand, some people who are fed up with forced choice tests might like this kind better.