I've watched this show from it's inception, but it had been a while since I'd seen the very first ep. I now know why I came back to this show last year after not watching for a couple of years. South Park has come a looong way. If people think South Park had "jumped the shark", it's now unjumped it. The satire, and double plot lines in the past three seasons are so much more intelligent, and funny than the first season. The first ep. was like watching 'Peanuts' with cusswords. Well not that basic, but you can tell how they've refined the characters over the years.
I've seen South Park's tribute to Monty Python (a video clip from the internet), which includes cameos from Michael Palin, and Terry Jones. That proved to me a deep connection between this show and British humor (which I prefer over most American comedies). What a great show.