Example of Brand personality
If you compare a small car like to Volkswagen beetle, against the Lamborghini Diablo, then you will feel that the Beetle is a fragile human being, strong in the inside but like a gentleman or woman on the outside. On the other hand, the Lamborghini is a beastly human being, aggressive and raring to go. Most people would say that the Beetle is on the feminine side whereas Lamborghini is completely Macho. Thus, slowly but surely you are building up a brand personality for both the brands.
Now you can also do this for any other product or brand. Compare BBC to MTV, or Nickelodeon to Discovery channel, and you will see that the brand personality is changing. Understanding the aspect of these brand personalities, will also help the brand manager in deciding the right media vehicles for the propagation of the brand.