Trying to sneak a fastball past Hank Aaron is like trying to sneak the sunrise past a rooster.
I care very much what the fans think. I'm starting to loosen my grip on caring about what critics say, because I think that critics care about what fans think of them, too, so there's a little bit of a refraction there, through that glass.
If you have a perfectionist streak - and who doesn't? - running can kill the perfectionist inside you.