Re: The Simpsons Thread
The Simpsons was absolutely amazing for the first 9 seasons, and season 10 was when the decline started IMO. I think they might have changed writers around that time but I'm not sure.
Regarding Family Guy, I think that the two South Park episodes 'Cartoon Wars' which completely ripped the show as being a bunch of random interchangeable jokes, kind of ruined it for me. I never found it as funny afterwards.