It varies for me. I like to watch in bed until I'm tired enough to go to sleep, but otherwise it depends on what I'm doing. If I'm working, or pottering in the house I tend to listen to music, but if I've finished work, done the chores and am sitting down to knit or whatever, I will put the TV on and watch a series of some kind (I can't sit still and 'just' knit - I need to have both brain and muscles working - probable ADD).
In the evenings, I relax with a soap first, and News-type programmes such as Question Time, or Peston. I prefer to binge drama, so if they are released an episode at a time I often record them and watch it all. I do scan the listings, though, and if there is something worth watching I will either see it live, record it or make mental note to catch it on iPlayer or whatever. Tonight I will watch the Alan Bennett programme, and maybe record The History Boys to watch for the hundredth time
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I'm not addicted in the sense of having it on all the time, but I would miss it if it broke. I think having so much choice of what to watch means there is always something, unlike when there were two or three channels and as often as not there was nothing you wanted to see. I never used to put it on and then look to see what to watch (ie I would only put it on if I knew I wanted to see something) but I do nowadays.