We own a TV but no cable. Mostly use the TV to watch movies, because there's only one PBS channel that comes in at all, and even that is sketchy. Still, don't have time to watch movies that often.
Haven't had cable in almost 10 years. When we did, it was expensive and stupid, all the shows were so darn dumb. When I stay in hotels for whatever reason, I usually put the TV on low to drown out the noise of the other rooms and people in the hallway, and the stupidity is just amazing. Even the "news" shows, you wonder how anyone can be so credulous and foolish.
I think you don't realize how much time it sucks up out of your day until it's gone. I get so much stuff done at home: training the dogs, gardening, minding the chickens, cooking from scratch, sewing, swimming, minding the firewood and wood stove in the winter, building stuff, working on house renovation projects, fishing, hiking. My colleagues hardly do anything at home other than drive their kids to dance recitals and piano lessons, and then they complain that they have problems with their weight, are constantly dieting, etc. Well, yeah...you sit on your butt in front of the TV, then sit on your butt in the car, then order takeout so you won't miss your favorite prime-time TV show...what did you think would happen?
The only downside is, I don't really understand a lot of pop culture. Any joke that refers to some TV person or actor, forget it, I'm lost.