Stuttering John Question

I've been a Stern listener since the mid-'90s but it was mostly a casual listener to the show for maybe thirty minutes a day. I didn't become a hardcore "Super Fan" until the Sirius years, as I was able to consume more of the show via the 24/7 replays; subscription to Howard TV; & then the eventual downloadable full episodes via the app.

I see a lot of people on here who long for the old days with Stuttering John, Jackie, and Billy West, and I'm curious about one thing. While Billy and Jackie's contributions were obvious, I still don't know what Stuttering John did that makes people miss him? Is it just the nostalgia or am I missing something?

Yeah, I know about the celeb red carpet interviews, but eventually those became more of a joke as all of Hollywood eventually caught onto the bit. So, I guess I'm wondering after that what did he do on the show that was so invaluable and endearing? Especially considering Howard has held an almost thirty year grudge towards Jay for pinching him.