Which one are you using /g/
I'm thinking about buying spotify premium when my deezer free trial ends.
I've used Pandora since 2007 and have had no reason to move to anything else. Simple the best algorithm to discover new music in any genre. The trick is to be aggressive with the thumbs down button, and sparse with the like button
NetEase Music = Free streaming music from China
Beatport = Free club music streaming from Germany
I would go with either Apple Music or Google Play Music All Access since they allow you to upload your own music. I don't like the idea of paying for a music subscription service when any track or album can be removed at any time. By being able to upload my own music, I can fill in the gaps. Google Music is free to upload 50k songs and works on a lot of devices. Apple Music has iTunes Match for $25 a year where you can upload 100k songs and they will be saved in the cloud. If you pay $10 a month for Apple Music the iTunes Match functionality is built in and of course you also get a full blown on demand streaming service like Spotify. The same goes for Google Play Music All Access. However, with All Access you also get YouTube Red which lets you download youtube videos on mobile and play them in the background on mobile. It also gets rid of the ads. It might be useful to you if you watch a lot of YouTube on mobile or chromecast.
I am using Apple Music right now because I got some iTunes gift cards for cheap. It's not too bad. People have done a lot of bitching about the app design but I don't find it any more complicated than any of the other streaming services. At least it can properly display album artwork, unlike Google which blows them up and zooms in. People have had issues where Apple Music replaced their uploaded music with edited versions, but I haven't had any of those issues.
Spotify isn't a radio type app. There is a radio feature but it sucks. Spotify is more like having unlimited credits on a jukebox that has tons and tons of songs. You'll have better luck searching pre-made playlists by other users than you will using the radio feature if you want to use it to discover music you don't know. spotify works best when you know what you want to listen to.