assigning task (& task lists) to single user/oneself

assigning task (& task lists) to single user/oneself

For the single user, repeatedly assigning a task to oneself is an enormous waste of time and effort.In this situation, I would like to suggest that  the possibility of making a default assignment choice be provided.

For example, when setting up roles and people, if there is only one person who has chosen the role of portal owner --
or whereby the "portal owner" is also the "administrator" (& perhaps the "employee") -- then the system will automatically assume that all tasks (& task lists) have been assigned to this one and the same person.

Or does this ability & function already exist??

Thanks.

Edited to clarify roles & terminology