In the documentaries that accompany the DVDs for the classic British comedy Red Dwarf, it's said that Chris Barrie, who plays Arnold Rimmer, and Craig Charles, who plays Dave Lister, really did not get along. At all. At play there was likely the class tension that is strong in British life. I always wondered why the anger at each other was so intense in the first season of the show and that background explains it quite well.
Unfortunately (or fortunately) for Barrie and Charles, their not getting along actually made the dynamic more believable and the show even richer, dooming them to eight more seasons and possibly more with each other. Funny that, isn't it?