I would like to review my unanswered, or questions where I didn't accept an answer, as maybe I later found the answer, or to ask differently. I'm also just curious, as I generally get comments, if not answers, in real time. Although I know of at least one question which I never expect to get answered, but it would still be interesting to have such a list.
I don't think there's a way to list all your unanswered questions, you can still do so with several queries:
If you want to find someone else's unanswered questions, replace the "me" in "user:me" with the user ID of whoever's questions you wish to search.