It will be cool if I will have access to my Favorite Tags from every page of SO.
For me it is most useful feature after my profile page.
My ordinary use case is loading SO page and reading some from my favorite tags, but now it is quite complicated adventure: I should return to main page where all my favorite tags lives, or I should go to my profile, or I should find interested tags among tags I am visiting. And I hate to use "relative tags" because it makes chain search.
Favorite tags can be added as link at the top with dropdown, or the same way as in main page or anyway you like :)
I am talking about access to LIST of all my
Favorite Tags on every page