Do you leave the TV on even if you're not watching it?
I use an iPad and close the cover and listen to an audio book or a documentary.
Pandora on Smart TV. Music most of the time.
No! Waste of energy!!
No. I haven't watched it for a few years anyway because I don't get reception here, but even when I did, I didn't like having it on as background. (Except I would sometimes fall asleep watching it... until I had a freaky experience one night...)
I do stream stuff, sometimes on the TV via an Apple TV, but I don't have that on unless I'm actually watching it, either.