Right now there isn't a great way to monitor the questions that I am interested in following. What I seem to do now is go to my recent history for questions I have commented on, and then link to the questions from there. The problem is, if I am really interested in a question, I have to monitor it closely. Sometimes I will "favorite" a question so it is easier to access more quickly, because I do not have a lot of favorites. But favoriting is not the right thing to do. I think you should only favorite a question if you really really like it, not to make it easier to follow.
I propose that you can mark questions as "interested" or something like that. What this means, is that you will get notifications for everything associated with a question: any time a new answer is posted, the answer/question is edited, and any comments to any of the answers (or question). This would make it much easier to follow questions. Especially if someone adds a new answer or comment way down the road, after you have long forgotten about the question.
It would also be nice if such a feature allowed you to write a sentence or two to associate with the question to remind you about something. In fact, if this is done, we could just use this feature to implement John Skeet's idea to allow an edit to notify downvoters. Instead of that specific feature, you can mark a question as interested after downvoting and add a comment, "remove downvote when fixed".
What do you all think? Do you propose a better way to manage monitoring questions of interest? (The other thing I do is keep a bunch of browser tabs open with questions I am following... and this is messy :-( ).