POST IT! Any song with lyrics that really make you think or have meaningful lyrical content.
I'll start with this one:
Nas and Damien Marley - Patiencehttp://www.youtube.com/watch?v=c9VQye6P8k0
This song blew my mind when i first heard it. They lyrics are some of the best I've ever heard. I've never really listened to Damien Marley (tho I love his dad's work :3) or Nas, but their Distant Relatives album was amazing. This song is probably the best track off the album. You'll probably love the song after the first verse.