I use Radarr and Sonarr for my movies/shows, and Spotify for music, but I do know there's another *arr app for that. The question is, is it worth setting up and how easy is it to discover new/similar music as opposed to Spotify, given that Spotify isn't expensive at all. And how do you fellow crewmen go about it?
I just switched to using Lidarr(+Deemix)+Plexamp exclusively, and I'm really happy so far. I also scrobble to Last.fm and have a small script that imports their recommendations to Lidarr. The important bit imo is that you have to collect a lot of music you might never listen to, just so Plexamp has something to recommend and build playlists from. But once you do it works pretty much like any other music streaming service.