The Include in List selection criteria for this list allows you to specify whether the list results should include:

Note that the default value for this option will be the most restrictive relationship a user may have in an effort to prevent users from accidentally running a report for all users.  That is, if a user has a Resource Requestor or Resource Planner role, then My Primary Requests as a Resource [Requestor / Planner] will be the default option.  

For those users having an Administrator role, the default value will be All Requests I can see.