Off set Eric is actually a really good guy and donates a lot of the money he gets from the show to good causes. Butters on the other hand has gone way off the deep end although he keeps it professional on set for the paycheck. He is like…weirdly obsessed with JK Riwling despite never having read a Harry Potter book. I used to work craft services for South Park way back snd the buddy I hooked up with the job after has been saying the actors have gotten to be top much in general aside from Cartman who from all ive heard has stayed very humble despite his successes