Optical illusions are a great way to keep your mind active and pass the time - but some can do more than that.
There are many brainteasers out there to help the taker's learn more about themselves. An example of this form of personality test is a famous oil painting that points out your least attractive quality - ranging from disorganisation to jealousy or an inflated ego.
Of course, no such test can fully define a person and should be taken with a grain of salt. That said, they are a fun way to think a little more deeply about who we are - and can be a fun talking point with pals.
