For most casual music listening I use Spotify; one thing that annoys me there though is that there are some songs which have clear compression issues, the kinda wavy, watery sound from early low bitrate MP3s. I can only notice it in one or two songs with a lot of guitar distortion / wall of sound though.

Its recommendations, daily mix and automatic playlist generated after listening to a full album are getting VERY predictable though. That is, same bands and often the same song. I'm not saying Spotify needs to improve their algorithm per se, it just needs to add a bit more variety - switch up algorithms from time to time, shuffle, start way down on the list of matched songs, something like that. It's getting annoying to the point where I'm considering switching to Apple Music for a while.

Anyway, for physical music I buy vinyl nowadays. I don't even have a vinyl player (yet), just a box of collectables / memorable albums. I don't like CDs, the boxes feel far too flimsy; I've never owned any.