mine would be Into Eternity by Into Eternity, off their first album named...you guessed it, Into Eternity.
it's a song about a guy on the verge of death, and he's afraid to die. the chorus goes, "and then he stared into the sky, feeding his fright, denying. feeling the pain, hear the screaming, 'i don't wanna die, don't wanna die'"
it just kinda hits close to home for me, not sure why.
my other one, Sillouhettes by Smile Empty Soul. this song has always held personal meaning for me, because my mom has always been afraid of things to remain unnamed, and my dad just gave up on his family and personal well-being, before i was old enough to understand swear words...you know..back when you think "shut up" is a bad word? yeah, around that time.
so Sillouhettes, by SES, is kinda like a personal reminder for me.