If only The Simpsons had quit 10 years ago, I might go with them. I love the Stewie/Brian stuff on Family Guy, but I think South Park has maintained excellence more than Family Guy. Roger on American Dad makes me laugh, but not as much as Stewie/Brian or Cartman/Butters. I also liked that show with the time traveling red haired kid with glasses and the nerdy dog from the sixties that was played in reruns for years. Can't remember the name of that one.