Sometimes I will see a question that I wouldn't upvote but would like to mark as a "favorite" (e.g. to follow it, or to remind myself to think about it later).
Does marking a question as "favorite" imply that it's a high quality question? Alternatively, does it send the message "this is a good question!" to the OP the same way that an upvote does?
If so, I might stick to bookmarking such questions in my browser instead of marking them as "favorite" in the future...