Hello! In order to get your favorite music in your playlist, you can play more of the tracks you love, so Spotify can suggest you tracks that better fit your tastes. By the way, remember that this is an automatic system so it can be wrong sometimes. Just play your favorite perks and Spotify will know you better. It's all about patience.
By the way, I listen my preferred songs since always! I use Spotify many hours a day on various devices. But I still get suggestions for songs of styles I've never heard of. This algorithm you use might be a bit smarter to avoid that sort of thing. If Facebook succeeds, you can too!
Well, maybe the wrong suggestions are there because the users who listen to your favorite tracks might also like what you don't like; suggesting what other users who like your music also like is at the core of the suggestion engine - what can I say; time will let the engine gain experience.