Why do I run?

The other day a friend asked me why I continue to run if I complain about it all the time. He bicycles all over creation and says he always enjoys it.
I can think of two answers to his question.
The first is simple. I complain because it gives me a chance to brag about how far I’ve run. I like to be the centre of attention. This is a mark of poor self-esteem and I do need to work on this.
The other answer is that when I am running, I am usually training for something. When you have to do something, it becomes less enjoyable. Some of the best runs I’ve ever had have been short 16-km ones that didn’t matter. When you pile on the distance, because you have a marathon coming up, then it starts to become work.
Competition ruins hobbies.
Why do you think no one watches the Olympics anymore?