I have never seen the Frequent tag, because The "Ugly Blue Bars", can also be questions that are tagged for your Favorited tags. The system highlights these favorite tags for you, making it easier to find questions with that tag in the list.
What happens if you set up a favorite, instead of having the system pick something you were at a few times. ( I had a favorited item before I even made the first post )
They may not be pretty, but they can be pretty useful. Using a combination of "ignored" tags, and "favorite" tags , you get to see the whole list, ignored items are ghosted, and favorite items are highlighted/colorised.
Like it said at stack overflow, set one measly Tag as Ignored or Favorited. Ignored does not make it dissapear completly, and there is probably a lesser used tag, that wouldn't cut into your list to much. 157 pages of tags, mabey you can find one thing to ignore and have ghosted slightly?