Happy song: "It's 5" by Architechture in Helsinki or anything I can sing with my friends. =3
Sad song: "9 Crimes" by Damien Rice and "Falling Slowly" from the ONCE soundtrack
Bored song: Currently it would have to be anything by Iglu & Hartly, MC Chris, or Big Bang. =]
Love song: "Existentialism on Prom Night" by Straylight Run and "Samson" by Regina Spektor
Party song: "Let's Get F***ed Up" by Start Trouble..... it's totally ridiculous/obnoxious, but I've made some awesome memories with that song playing. lol
Angry Song: "Timebomb" by Ohgr or anything by Mindless Self Indulgence.