Often, I don't want to save a question as favorite, but I do want to keep track of it, as I might want to answer when I have more availability.
What is the best way to do this, or could/should this be a feature request?
I use the favorite functionality for this actually.
When I see a question I want to answer, but lacks the time to do so, I mark them as favorites.
Later, when I revisit the questions (and hopefully answered..) I unmark them as favorites to avoid them drowning the questions I have marked as favorites for other reasons.