Just to get ideas, what custom reports are users looking for that can not be built by Jira.
(My ulterior motive is to write a blog post that's like "how I used the product I make at work to index all information at the company". I can usually just do a linear scan across the backlog to find the issue I want, but hey, when marketing and software combine, I can't complain.)
If there's some service I can buy that does this, though, I'd rather use that.