The concept of favorites exists in many places in Aha! — favorite reports, favorite attachments, and even favorite notifications.
One place I’ve realized that I’m really wanting this functionality is with the records themselves.
I would love to be able to favorite the few records I’m actively focused on so that I can easily find the notifications that come in about them (put them all in the Favorites section in notifications), and maybe also have a filter to only see them on the my work page.