Here's my business case:

Homer Simpson is set up as an Approver in our system. He can see items that are awaiting his approval, but we can't find a way for Homer to view things that he has already approved. 

The custom view builder and custom report builder allows us to filter based upon Approval Status, so we could see items where the status is Approved, however, Homer can't set a view to show requests where Approval Status is Approved and Approver is Homer Simpson.

Does anyone know how to achieve this? Our approvers would very much like to be able to go back and see what they have approved, when needed.