Storm Eagle, you're spot on - I loved the sarcasm. And therefore, the relationships he had with the others was kinda fun too - the tension and that fact that he was an outsider was an interesting thing to play - especially how to balance that with keeping him likeable.
I remember one of the writers telling me they added a couple of sarcastic lines early on but wasn't sure how it would go because it's hard to keep a character likeable while being snooty! But after they saw the first couple of episodes and realized it kinda worked - they just went for it and so did I!
I kinda liked the special relationship that Tori had with Cam too - that she was always supportive - could see through the sarcastic exterior to someone who just wanted to be accepted.