For CI jobs, it is not uncommon that you want to include all elements of a given custom metadata type except specific elements

Today, you need to have two entries - an include all (".*") expression and an exclude expression. For users who are not regex savvy, this is too complicated.

We should have "All", "Named", and "All except Named" at the top level so simple check boxes can be used.

This is particularly useful for CI jobs (whose purpose is to sync VCS w/ org) - you want to sync most everything except a few items - like Sites and their Profiles that SFDC prevents from deletion.

Or to skip a bunch of irrelevant-to-you standard Objects that SFDC keeps adding every release