Easier to add to or remove from default selection

When adding content to our product, users have a few options they can select. These options have two states (selected and not selected) and can always be changed. There is no difference in value between the options and they are all optional.

Is it easier to remove from an all-enabled selection or to add to an all-disabled selection?

Note: I'm aware that this is influenced greatly by context and user goals, but I'm looking for a theoretical answer.