Just post music that means something to you not only because it's a song you like but also because of a role it played in your life or something it symbolizes. Songs that give you chills when you listen to them.
For me a major one would be this:
It makes me emotional every time I hear it. It's a very special song to me for many reasons. This song has made me cry. Also, acapella rendition FTW.
A few others would probably include the Super Metroid theme song, Final Malladus Beast from Zelda: Spirit Tracks, the MGS2 theme song, and Ripple Star from Kirby 64