You can filter playlists by genre, mood and follower size, so you're pitching to the ones that actually fit your music. Use the filters at the top of the playlisting section to narrow things down.
What you can filter by
Genre: find playlists that match your sound
Mood: match the feel of your track
Follower size: focus on playlists at the scale you want
Tags: Responsive (faster reviews), New (added last 30 days), Popular (in high demand with artists), High Placement (higher than average acceptance rates)
Why filter first?
Pitching to playlists that suit your sound gives you a better shot at a placement, so a bit of filtering up front saves your credits and your time. Make sure you are always listening to the playlist to ensure your music fits, as the human ear is always the deciding factor.