I think it'd be beneficial if there was at least the option to consider all questions I've asked to be "interesting" (highlighted as if there was an interesting tag) regardless of whether or not the question is tagged with one of my interesting tags. I could understand some people not necessarily wanting it on by default, so I'm not sure what the default would be for this option if it existed but I definitely think it could be a useful option to give.
To me it just makes inherent sense that your own question is considered interesting, after all you wouldn't have asked it otherwise. So for that reason, highlighting it as such would serve the same purpose as highlighting questions with tags that you consider interesting except you are less likely to be looking for your own question with the intent of answering it like you would others' questions.
The one specific example that drove this was I posted a question and was interested in seeing where it sat on the "Active" and "Unanswered" queues since I know that once it falls down past a certain point it's less likely to be happened upon unless it's got interesting enough tags and/or search keywords so that people can find it.
edit: added clarification paragraphs