They play taps on most Army installations at 10pm every night. If you're lying in bed with your windows open, it always sends chills down your spine thinking of all the people that song has been played for.
Likewise, if you ever have the opportunity to attend a military funeral, you should. The final roll call followed by taps will turn the hardest human into emotional mush.
Besides Taps, here's the rest of mine:
Amazing Grace, bagpipes
Pearl Jam, Jeremy
Billy Joel, Goodnight Saigon
SGT Barry Sadler, Ballad of the Green Beret
Hymn to the Fallen (Saving Private Ryan theme), John Williams
Duel of the Fates, John Williams
What a Wonderful World, Louis Armstrong
The Lady in Red, Chris de Burgh