When people get going about how atheism is so cold and heartless, without beauty or mystery or wonder, I always wonder how they can know me (I'm all about beauty and mystery and wonder!) and think this is true. I find far more joy in learning WHY the world works the way it does than explaining it away with "God made it that way." And the absence of belief in heaven has actually made my life richer and more meaningful.
Photo source: help me track the original down so I can give the photographer credit! Photoshopped quote and earth by Reddit user JesusClausIsReal. Quote from speech delivered to Harvard Humanist Society, April 2010, by Adam Savage - full text here.