It's unfortunate that you've lost track of the most interesting pages you've come across. Built-in browser bookmarking systems and managers leave much to be desired on the categorization and prioritization side, in my opinion.

(On a mostly unrelated note, around ten years ago, someone posted a motivational/productivity article on Hacker News that used video-game-themed metaphors and artwork, reminiscent of Heroes of Might and Magic. It involved going down one path or the other, and for one of the paths, the author asked whether you really wanted to be "hanging out with the hydras". I've never been able to find it since. Does anyone remember it or know how I could find it?)