Well Goodman didn't have a lot to say about Carson because
he's not old enough to have watched Carson as a kid. (Pause while we reflect on our own mortality. Ahem.)
I remember what a treat it was to get to stay up and watch Johnny -- it was one of the reasons I looked forward to summer vacation.
My favorite Carson joke: He had Don Rickles (a frequent guest) on one night back in the '70s. Rickles was famous for a number of failed TV series and even more unsold pilot episodes (this was pre-"CPO Sharkey", the closest he ever came to a hit show). The subject came up and Carson said "you've had your hand in more pilots than a Air Force proctologist".
The most oft-repeated Carson anecdote is the one about Eva (or maybe Zsa Zsa) Gabor. This was also early '70s. Supposedly she came out and sat on the couch with her pet cat and said to Johnny, "would you like to pet my pussy?" To which Carson replied "You'll have to move the cat."
Now, a friend of mine in high school saw that show and came in the next day and told us the story. I have no reason to believe he made it up, and there are many many people who SWEAR they saw it too. It's in "urban legend" territory. But over the years NBC and Carson's PR people have consistently denied that it ever happened. Here's a link to an Urban Legend website page about the story:
http://www.snopes.com/radiotv/tv/zsazsa.htm