you may have to give an example of what you mean. Right now we don't have a fast way to get to favorite tags but we do have an extremely fast way to get to lists and favorite communities. The important part is now that they are on the top they are always available no matter what page you're on. Previously people had to click to get to certain pages where they would then be available on a somewhat less than appealing box that made everything a bit messy.
But still willing to see what you're thinking of.
By favorite tags I meant this:
It would be cool if we could have the same box but with subbed communities :) Or it can be in the same box I think.