I like Black Swan because it is artistic.

It is a song that expresses fear and passion for music through a dark and beautiful atmosphere.
The dreamy sound and heavy beat blend together to give it a different feel from other BTS songs.
The members' delicate vocals and rap make the song's atmosphere even deeper and more intense.
It is even more impressive when you watch the performance as well, because the music and dance feel like a single work of art.
If you like BTS's experimental and artistic music, this is a song I definitely want to recommend.