Plex server on a purpose built Linux box with about 34tb. I mostly use Usenet for sourcing stuff, because it's so quick and comparatively private, but I also use torrents for some harder to find stuff. I also buy a lot of the more obscure music I want from Bandcamp and just download the highest quality version.
I ran in parralel with my streaming services for a month, just in case I ever had trouble finding current shows we're watching, but I've never had trouble finding good quality rips of shows the same day they are released.
I just can't tell you how good it feels to look at my TV, movies, and music collection and know that it's mine. Every episode and song and film is mine to store and protect, and not subject someone else's license agreements.