The bandcamp app is great. You get 2-3 free streams of any album, plus an enormous catalogue of radio shows to discover new music through. It's really reinvigorated my passion for music.

Once you've listened to an album a couple of times, you have to pay for it and then you get unlimited streams.

If there's an artist that isn't on bandcamp (many artists on major labels aren't) then I use plexamp. The monthly bill for that server has effectively replaced my streaming bill.

I run navidrome on my Pi4 at home, and Wireguard on the Pi so my Android phone is always connected to home (I have a fixed IP but a DDNS would also work). On my phone I use subtracks: https://github.com/austinried/subtracks/releases

Not very often, trying to wear headphones less generally. At the moment though that's done with Spotify and NTS radio apps. I might mirror my music library onto the phone though. I was also thinking of moving my music library onto a server and streaming it from there, not sure with which software yet.

Not OP, but I absolutely adored Airsonic-Advanced and DSub from F-Droid. Caching, streaming, quality-adjustment (FLAC on wifi, lower quality ogg on data), adding music, and scrobbling all worked amazingly well. Would very highly recommend, and I have yet to find anything better.

For me: Android with Symfonium, streaming (or locally cached) from my Jellyfin server.