A saw doesn't have a will or a mind of its own - if all the components are right, it HAS to run. I keep telling myself that . . .
Blasphemy! Old saws have souls, and feelings, too! For those who have ornery saws, I'm guessing you can think about what you have done to p*ss off the saw (left it dirty, abused it, ran stale gas in it, duct-tape fixes, etc) that caused it to misbehave!
Ok, that was sort of tongue-in-cheek, but I swear some of my old musclecars had mean streaks. The worst ones would get jealous when I was spending too much time with another car!