Wow, I think 'Beware of Darkness' by George Harrison took my breath away when I first heard it. The music's great, but the lyrics are incredible!
"Beware of sadness. It can hit you. It can hurt you. Make you sore -- and what is more, that is not what we are here for!"
On a goofier note, 'Boris The Spider' and 'Mrs. Brown You've Got a Lovely Daughter' fascinated me when I first heard them. They still make me smile whenever I hear them.
Aerosmith, .hack//SIGN's music, John Coltrane... Good stuff...