I actually enjoy running and have done my fair share of 1/2 marathons. As I have to train for these events, it has helped me control my weight and kept me in shape.
Good for you! As for me, I stopped running the day I left the Army (30 years ago). I spend plenty of time on the treadmill, and I'll be walking 15 miles to celebrate my 60th birthday in a few weeks.
I rarely see people jogging with a smile on their faces. They don't look like they're enjoying themselves. ;)