What makes a good run?

There are many ingredients to a brilliant run; here are some of mine that occurred to me yesterday while on the treadmill:

1. 10k (that's 6.2 miles) in 47 minutes or less
2. Sweat makes my eyes sting
3. A really high heart rate (180bpm) declining to less than 130bpm under one minute
4. A good stretch afterwards....
5. ....followed by a red hot shower
6. During the run I just refuse to slow down at all
7. Saving some energy for the last 0.2 mile when I run absolutely as fast as I can without falling over
8. Believing my running form is reasonably smooth and fluid
9. Seeing I have burnt off 700 calories and....
10. A good dose of the Runner's High with all the incredible feelings of confidence; mental balance and inner peace; euphoria

How about you, what makes a great run for you?  Please leave as a comment, below...

Also worth checking out: What is the Runner's high?