Differences in YouTube, Spotify, etc.

Qobuz, for sound quality. The interface is good and improving, the content likewise, and the recommendations are OK.

Dislike Tidal, both the SQ and MQA and the interface and recommendations.

I liked Deezer but Qobuz trumps it on sound quality (Deezer is 'only' CD quality), but the recommendations were the best.

Definitely give QB a try. 

I'm using Amazon because wifey buys so much crap- sounds good to me but its app (especially for IOS) is maddening.  

Have tried Qobuz and Tidal but keep coming back to Spotify. SQ difference is almost undetectable to me and the interface, diversity of playlists is far superior. 

Amazon HD for me . It's cheap, tons of music and easy to use for me.

Easy, Qobuz.