My favortie episode still has to be the Scientology send up where Stan was deemed to be the second coming of L. Ron Hubbard...
"Mom...dad...Tom Cruise won't come out of the closet!"
Given Scientology's propencity to sue people who slander them all of the names in the credits were either John Doe or Jane Doe!
I go back and forth - most days I love it and think it is dead-on fabulous biting satire, but some days/episodes I think it is just stupid toilet humor.
Occasionally an episode will just plain suck. It' won't be funny, shocking, or have a message, but I think it's because the creators like to take chances and really push it. Any given week could be the best episode ever.
IMO the absolute best was the Ocean's 11,12 whatever takeoff where the entire presidential election was a plan between Obama and McCain to steal something from the Smithsonian - and Palin was the mastermind w/ a British accent!
Though the whore-off w/ Paris Hilton was great too!