As the title says....which song still haunts you emotionally? And why? A (freely accessible) link might greatly bring your point across.
Mine would be: (Typhoon - "Empiricist") https://www.youtube.com/watch?v=9E328pIZWFM
The lyrics go deep and it just touches me. No otherwise special attachment.
It almost feels like cheating, but Somewhere Only We Know by Keane always manages to get me, especially since it seems like the lyrics become more poignant the older I get.
Honorable shoutout goes to Johnny Cash’s cover of Hurt.