I know that Spotify is considered to have the best algorithm for suggesting new music. However, the sound quality isn’t there. Therefore, I use Tidal for lossless hi-res playback (of at least some of the library). Today, I’ve found that Tidal does a pretty good job suggesting other tracks I would like to listen to after playing an album. Some time back, it was just suggesting rap, and other stuff I didn’t care to listen to.
I don’t use the suggestions options very often. I have several people and places that I look for album and playlist suggestions. I’m not into the current pop chart stuff for the most part, but I do have pretty broad tastes in music, from Jazz, Blues, Rock, Electronic and Classical.