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.
Apollo 440( with Billy Mackenzie) - Pain in any Language
It's a beautiful, depressing song and Billy Mackenzie's vocals are just haunting. A girl I was hopelessly in love with introduced me to the song, so that adds to its effect on me...