Growing up it was always youtube for everything, but now I find myself more into twitch for regular entertainment. Netflix usually for movies/tv shows. Youtube is more for tutorials on how to do things now.
I don't really have a favorite, I pick between Netflix, Hulu, and YouTube depending on who has what and what I'm currently in the mood for. I do seem to use Hulu less often though. Maybe I prefer red over green, lol.
Netflix for watching things with family but definitely YouTube/Twitch for anything I have on during the day when working, etc. I usually have some kind of game streaming on in the background.