Hey, that was cute. Although the questions asked by Lipton are from Bernard Pivot, not Marcel Proust, but maybe that was intentional since she left out some of the Pivot questions and asked a bunch of different ones.
I don't think I could possibly name a favorite South Park moment, much less a favorite episode, there have been so many awesomely brilliant ones. Some favorite episodes would include some of the episodes focusing on Butters (the one where we find out his dad is gay, the Casa Bonita episode, the episode where they send Butters to anti-gay camp), along with the Starvin' Marvin episodes (Sally Struthers as Jabba the Hut is so cruel but so funny), the one with Miss Chokesondick, the two-part "Go God Go," "Trapped in the Closet," the one where Mrs. Garrison realizes she's a lesbian, the Big Gay Al episode, and the "Do the Handicapped Go to Hell?" episode (the one with Satan, Saddam and Satan's new boyfriend, Chris) come to mind, but I'm sure there are some other favorites I'm forgetting.