SOP's are of major importance, if they are incororated into each recurrent they become the norm, the leading FTO's are happy to do this. But it must be said, they are pimarily designed to standardise multi crew operations, there are many operations that have only one crew and these will tend to modify their SOP's to suit themselves. Nothing wrong with that in my opinion as long as the result is a safe and amicable operating environment. There's more than one way to skin a cat.