I like let's play streams.
If I really like the look of a game that I haven't yet played, and spoilers are coming thick and fast, I'll bow out, but quite often I'd rather have a social experience (like playing with my brothers when I was younger) than flounder on a game all by myself. "Single player" games are always my preference but I so rarely used to play single player games alone. Streams kind of recreate that atmosphere, but with someone else at the helm.
I enjoy streams live, so I can chat in the window, and make suggestions, I don't very much enjoy just watching a saved stream as it's not social any more.