Cheers spinning off into Frasier.
Cheers started before my time but my parents watched it so it was on in the background until I started watching it and then Frasier.
At the same time MASH was on repeat.
Each series has 11 seasons, 33 years of programming that had that 'always there' feeling.

The Next Gen, DS9, Voyager run was awesome too. Sooo much good Trek.