Introitus of Mozart's Requiem. Skull crushing kick in the face good. The rest ain't too shabby either.
Johnny Cash's version of Sunday Morning Coming Down
Perfect Day - Lou Reed. It's really not that great of a song, but it reminds me of someone I miss.
Freight Train - Elizabeth Cotten. One of my favorites for a long long time. One of the few songs I ever bothered learning how to play on guitar.
Cool Water - Hank Williams