Let me further elaborate.
I am not talking about large deviations from the SOPs.
I am talking more about captains who like to "split hairs" in regards to general flying techniques / procedures and the exact interpretation of the SOP's.
There are many different ways to fly an aeroplane or to interpret the SOP's. Usually 1 method is just as safe and efficient as another, and perfectly safe and legal and within the confines of the SOPs.
Some captains like to "split hairs" over things than don't really matter at all and others (training captains) just could not care about it because its not important.
Some captains are adamant that I fly their way even if my way will make no real difference at all to the end result.