Death is an endless night so awful to contemplate that it can make us love life and value it with such passion that it may be the ultimate cause of all joy and all art.
There are probably more annoying things than being hectored about African development by a wealthy Irish rock star in a cowboy hat, but I can't think of one at the moment.
You define a good flight by negatives: you didn't get hijacked, you didn't crash, you didn't throw up, you weren't late, you weren't nauseated by the food. So you are grateful.