Further to my earlier post about "The Bob Newhart Show," one oddity that I noticed is that every time the writer/producer David Davis left a show, it got better. Davis (and his writing partner Lorenzo Music) was a top writer on "Mary Tyler Moore" for the first two seasons; he and Music left after season 2, and "Mary Tyler Moore" got much, much better and funnier in season 3.
Then "The Bob Newhart Show" seemed to get better the more Davis and Music stayed away from the show and left it in the hands of Tom Patchett and Jay Tarses; the best season of that show, season 4, was the first season where Davis and Music weren't involved at all.
And finally, Davis was one of four creators of "Taxi," but he was only involved with producing the show for the first season -- which was not as good as the Davis-less seasons that came after.
None of this is meant as a slur on Dave Davis, a fine writer and a brilliant producer of title sequences (the "Bob Newhart" and "Taxi" main titles are his creation); MTM didn't get better because he left, but because they brought in new writers like Ed Weinberger and David Lloyd. But I just thought it was odd that a guy should leave behind him an apparent pattern of improving shows by his departure -- kind of Ted McGinley in reverse.
Oh, and speaking of "The Bob Newhart Show," Newhart recently mentioned at a public appearance that the fourth (and, as I said, best) season of that show will have DVD commentaries with Tom "Peeper" Poston and Suzanne Pleshette -- who of course is now Mrs. Tom Poston.
I'd still love to hear what a Jay Tarses DVD commentary would be like, though. I have this feeling that most of his comments would be omitted by studio lawyers.