3. Peri
Peri is one of the few companions who has to actually ask to become a part of the TARDIS crew. Bright and spirited perhaps, but also abrasive with a tendancy to rub people up the wrong way - The Doctor included. She does eventually settle down, but she has already done her screen reputation damage by portraying herself as a grumpy know-it-all. She lacks personality and warmth as a character and constantly complains. Kiv and The Valeyard should have allowed The Doctor to continue to believe that she was dead. Loud, brash, whiney and thoroughly grating on the nerves. Sorry Peri, but an impressive rack isn't enough to make you likeable - not even to some of the male fans.