I just took the Harvard Implicit Association Test, which concluded that I have a strong automatic preference for young compared to old. That's not unusual -- about 35% of the people who took the same test had the same result.
The same site has tests for attitudes about race, religion, gender, sexual orientation, etc. If I take those tests I probably won't bother tell you the results.
One thing I wish the site did: tell me how I compare with other people from the same demographic. The site collects my zip code, occupation, education level, etc. -- I wish they would expose the results they get.