Oh I am sure a lot of it , is for the cameras, I bet in real life Ryan and Simon are great mates, besides that is what makes the show so good, all the bickering and snipes etc.
One thing I would love to change about Simon (although I love ya mate) is your dress sense, I HATE your T-shirts, they show your man-breasts too much, and you could look so cool, let me get my hands on you lol.
Now Ryan he is the hottie of the show, simply DEVINE!!!:) :D