Why does Christy Moore have a propensity towards singing depressing tunes? Don't get me wrong, he is a master of this genre. And, to be fair, not all the tunes are downbeat - "Lisdoonvarna", "don't forget your shuffle and "delirium tremens" are really funny. I particularly liked the lyric in "delirium tremens" about Charlies Haughey taking crossmaglen and Gareth giving it back again!
But, where is the belly full of joy? I think its a question of how one views life and its purpose. It is easier to write and sing a mournful tune than one which is motivated by a belly full of joy as real joy is a rarity.