I have long loved Walton.
He was also great on the NBA games and would still be there, imo, if not for his back problems and travel. Bill just can't take the physical toll on his body of traveling all over the country, so he has to stay more local.
I think he's great as an announcer for several reasons:
1. He brings enormous joy to the game and life. His vibrancy is fantastic.
2. He obviously knows the game and communicates that knowledge very well.
3. He's a hipster and knows the culture well, also.
4. He's very humble - in spite of being one of the greatest basketball players of all time.
Re: 4, Walton and Alcindor are the two greatest CBB players ever and if not for injuries, Walton would have been an all-time center in the NBA. When he was healthy there was a time he was the best in the league at Portland (that Portland team that won the title would have won two in a row if not for Walton's injury the next year. But that team with Dr. Jack Ramsey coaching - a brilliant, and deeply underrated coaching mind - had the most efficient offense I've ever seen with Walton in the high post and Walton's defense and rebounding were second to none in his era).