We never connected up the aerial to avoid the Licence Fairies, so it's Netflix and Amazon here. Netflix has got a lot better in the last few years, it used to be pretty dire, but there's a good selection of TV series now and it's more comparable with, say, the selection in the US. I've certainly got a long backlog of TV I want to watch (and there's no loss if you start watching something and a couple of episodes in, you bail because it's not very good). Movie-wise, it's a bit hit and miss, a lot of straight-to-streaming dross, but a couple of big hitters. I sense the big studios probably aren't especially keen to feed Netflix, hence Netflix producing a lot more of its own content.
Amazon Prime is a bit meh, occasional shows and movies. I'd probably drop it if the price goes up and it didn't include perks like fast delivery. I'm not sure I'd sign up today. Availability can be annoying, quite a lot of movies aren't available or are purchase only, which is pointlessly frustrating.
We also rent movies to stream. I think they're often a bit pricey given you can often buy them sub £10 after a couple of weeks, but it's convenient after-pub fayre.
I confess though that we don't seem to get through nearly the same amount of TV as our peers, I honestly couldn't sit there all evening. I can watch a movie or a episode or two, after that my mind begins to wander.