I think that when you're feeling down and depressed that comforting music speaks to your heart. It's like Jesus coming to offer comforting words and putting his arm around you. At least with gospel music but, there are some rock songs that do this for me too and I cry a little because I know that he's there for me and cares. Late 80s music is emotional for me too but, it's more about wanting to go back to that time than anything else.