"Dammit" by Blink 182 is pretty close to home for me. I've had situations such as come along often, and the general feel of the song kinda makes me remember the pace that my life has taken.
"Back in the Day" by The Pharcyde. I'm one of the nostalgiac types who likes to look back and remember his childhood and upbringing, lest I forget it. I've had alot of experiences and friends, all of which I have not much of a memoir with me anymore because I moved so much. So yeah...
While I am generally a positive person...
"Reloaded" by Winds of Plague
Its one of those songs where I hear the lyrics, and look to some of the people I've met and seen in life, and I think "You know what... lets go fuck those people up". The energy is intense and destructive in nature. I love fighting, its one of my favorite passtimes (due to my martial arts background) and win or lose, I love doing it. And the relentless nature of the song reminds me of all the different fighting experiences I've had, be it in a dojo, tournament, or with friends.