Quote Originally Posted by Jaf-Photo View Post
Well, perhaps you can view box speed as a kind of starting point?

Then different films behave differently. Some like both being pushed and pulled, some like one but not the other and some likes neither.

Colour films are different from B&W too, usually requiring you to stay pretty close to box speed.
You are correct that box is a place to start.

The films and developers are not the wildcards, we are, all us nuts behind the cameras and agitating our films.

The materials we use are remarkably reliable and consistent as long as we do our part.

Our vision for the end result and our preferences in how we like to do things are what drives us to deviate from "normal". These decisions are regularly poorly informed and done for irrational reasons.

As to color forcing us to stay close to box speed, that is at best an urban legend. Kodak's old Portra brochures claimed consistent color from one stop under to two stops over. Disposable cameras are more proof of that.