I don't think I use a streaming service.
I have Amazon Prime, but don't use it for streaming.
Frank has Netflix and has installed his Netflix on my TV, but the only time I use it is when he is over at my house and wants to watch something.
OK, frequently I watch youtube videos for free on my laptop computer. Does that count? If so, then I'd say that is my favorite. I could watch them on my TV but I don't.
I have taken a dislike to movies and TV series in recent years, so I don't watch many of them any more. It's just one more way that I just don't fit in with the rest of mankind, oh well. We are all at least a little bit odd in some way or another I suppose, or it wouldn't have occurred to us to retire early.
Happily retired since 2009, at age 61.