I use repeaters all the time too. Like @RNilsson, it's a joke at my office. I use them to create dropdowns, sidebars, interactive components. Basically anything where I might have to change the number of items later. Typing into a repeater dataset is so much easier than re-creating all those widgets. And if I want to make a change later, I can change it once, inside the repeater item, and then it just... works.
Of course, I also use them for data tables and lists, and things like that, where it's essential to filter and sort. But really, they're so flexible that I've started using them for all kinds of things.
Here is a file showing a simple version of a dropdown and sidebar with some of the repeater techniques that I use. Depending on what I'm trying to do, I often end up building things that are much more complex, but this is the basic idea.
repeater_samples.rp (62.0 KB)