In that order:
- Amazon music - terrible UI, HD, good library
- Spotify - great UI, no HD, good library, got the best public playlists and podcasts
- Apple music - it's ok overall, but apple's ''ecosystem'' p*sses me off big time
I've stopped using Quobuz because of their very limited library, other than that (and that's a massive issue) it'd be my 1st choice.
I'd only use Amazon music but i got Spotify and Apple for free through family offer.
When Spotify goes HD I'll probably drop Amazon music, their software support is so bad at a point it feels like a mark of contempt for their customers.