Would be great to have a Private check box on entities like Projects/Tickets/Notes.
So when private is checked only admin's and the people directly assigned to the project/ticket/note would be able to see it.
For Notes/Tickets its just an easy way to have more granular permissions for a particular item.
For Projects it basically means that users with the "see all projects" permission would not be able to see the project unless they are specifically assigned to it.
I do feel Admin's should be able to see everything as they are in charge of maintaining & administrating the site.
PS: I'm sure there are more entities which could make use of a private flag. Any suggestions?