Customising the search criteria of OS X's "All My Files" feature

Now, before I begin, I am well aware that many of you have not embraced the ‘All My Files’ feature of OS X since its introduction in OS X Lion. However, for those of you that have, you can tweak the search criteria this feature uses just like you can with any Saved Searches you create in OS X Finder.
Customizing the search criteria of OS X's "All My Files" feature
Simply right-click (Control-click, or two-finger click with a trackpad) on the sidebar entry, and choose Show Search Criteria. You will then see the Smart Search characteristics that power this entry and you can tweak and re-save the search criteria you prefer.
NOTE: You can not save over the existing All My Files saved search, but you can just save a new search instead. It’s fairly quick, painless, and non-destructive.
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This feature has been tested using OS X v10.8.4 which was the latest Mac OS release at the time of writing.