The Science Explorer offers a test that thousands of people have taken. Click here and you get the choice of two versions, one taking 10-20 minutes and one taking 30-40 minutes. The tests measure:
extroversion, agreeableness, conscientiousness, neuroticism, and openness to experience. Each spectrum in turn has six subcategories, resulting in a much more comprehensive and nuanced portrait of the human personality. The Personality and Social Dynamics Lab at the University of Oregon offers a full breakdown of the five dimensions.
