TBS (Turner Broadcasting System)
(launched as WJRJ in 1967; renamed WTCG in 1970, SuperStation WTBS in 1979, TBS Superstation in 1989, TBS in 1991, TBS Superstation in 1996, and TBS in 2004)
IMDb; official website; TV Tropes; Wikipedia

I mainly think of this as a channel for reruns of shows from other networks, which I generally don't watch on TBS either because I've seen them before, or because I have no interest in them, or because I'm watching stuff on other channels at the time, or just because it doesn't occur to me. Although I suppose I must have watched some reruns of old shows on TBS in the mid-to-late 90s. But there have been a few original programs I've seen a bit of, and some I'd like to see, but haven't had the chance.

stuff I've seen
Captain Planet and the Planeteers (9/15/1990 - 12/5/1992; I saw some of this in syndication, I think, maybe)
The Halloween Tree (10/30/1993; TV movie)
Dinner and a Movie (1995-2011; I didn't see much of this)
The Wizard of Oz in Concert (11/22/1995; TV play; also aired on TNT)
My Boys (11/28/2006 - 9/12/2010)
Conan (11/8/2010 - 6/24/2021; I've seen very little of this)
Sullivan & Son (7/19/2012 - 9/9/2014)
Full Frontal with Samantha Bee (2/8/2016 - 6/23/2022; I've mostly seen bits of this online)
Wrecked (6/14/2016 - 10/2/2018; I've seen a few episodes, but I still need to catch most of the season, somehow)
Search Party (11/21/2016 - 12/17/2017; I don't think I finished watching the first season before I lost interest. Moved to HBO Max for s3-5.)
Miracle Workers (2/12/2019 - present)

stuff I haven't seen:
Angie Tribeca (1/17/2016 - 12/30/2018)
People of Earth (10/31/2016 - 9/25/2017)