I think it would be neat if users could star a thread. Those threads could be viewed under "Show Posts". This would ideally allow for quick access to threads for the user. I'm not sure how unreasonable this request is, but it'd be neat imo!
I'd like to work on this, however most efforts are on the migration to the bleeding edge version of the software. I have no idea when we're going to work on it, but I can add a note to work on it sooner or later.
We've added it to the issue tracker. We'll be sure to give you a ping when this gets implemented!