Recently I enjoyed some very interesting quiz tests at BBC Science and Nature/Human Body and Mind Section. They offer a lot of interesting quiz and give you results after that. You will find amazing stuff about yourself after giving these tests. The list is pretty interesting I am mentioning here:
Put your senses to the test with senses challenge. I can bet you will loose many sections. Human senses can be very deceiving at a mere illusion. The quiz includes 20 timed questions and takes about ten minutes.