Spotify has so many unique genre categories which clearly evident through the year end summaries.
The idea is to include a "Sort by Genre" option for your own liked songs. You could have have the high level categories like Pop, Rock, Hip-Hop, Indie, Jazz, etc. This way if you're in a Rock mood, you can listen to all of your own liked Rock songs.
From there, you could dive deeper. For example, after Rock, you can get even more specific. There Soft Rock, Hard Rock, Alternative Rock, British Rock, Indie Rock and so on. This way you can get into each niche within your own liked songs.
Keep in mind that a similar Idea has already been suggestedhere so if you're interested in it, make sure to add your +VOTE there to show your support. This helps to keep all feedback in one place and helps the idea gather the necessary amount of votes to be reviewed internally.
More details on how your feedback reaches Spotify can be foundhere.