If radio shows count, I'm currently working on Dragnet (314 episodes) and Mindwebs (188 episodes). Listening has gone down a ton since COVID has killed my car trips.
Only counting TV shows that I didn't start watching when they were still getting new episodes, the longest running TV show that I've completed would probably be Twilight Zone (156). I also watched all of Gilmore Girls a few years ago (153). I've done a bunch of anime series, but after checking, most of the shows that I remember as long commitments at the time were less episodes than I thought (~70 at most, typically less).
Like others, I've had a number of series that I gave up on. I started Smallville but petered out somewhere around season 4. My spouse and I tried to get into Breaking Bad at one point of quarantine, but gave up around season 2 or 3.
Only counting TV shows that I didn't start watching when they were still getting new episodes, the longest running TV show that I've completed would probably be Twilight Zone (156). I also watched all of Gilmore Girls a few years ago (153). I've done a bunch of anime series, but after checking, most of the shows that I remember as long commitments at the time were less episodes than I thought (~70 at most, typically less).
Like others, I've had a number of series that I gave up on. I started Smallville but petered out somewhere around season 4. My spouse and I tried to get into Breaking Bad at one point of quarantine, but gave up around season 2 or 3.