I have a book (unfortunately, not at hand) by Richard Kelly, who was a professor at U of Tenn. Lots of insight to the show. For one thing, Don and Andy collaborated a lot with the writers. They would have a line that just did not "feel right."
Don (from West Virginia and Andy from North Corolina, would say, "How would the folks back home say this?"
One of the factors in the show's incredible appeal, I think
You are not the only one. I have several co-workers who can recite line by line sketches from the show. Apparently the show made a very large impression on most tv viewers of that era. Knott's character Barney Fife is viewed by me and my co-worker AGS fans as the funniest single character in tv comedy history. And Howard Morris's Ernest T. Bass is my alltime favorite recurring character.