Most of my Steam library is shit I have no intention of ever playing. I've bought a TON of bundles that contain one game I actually want that justifies the entire purchase; one or two that look like they have some potential, so I'll bookmark them for a rainy day; and like 15 digital turds that I now have the key to, so... why not, might as well activate.
The 'unplayed math' is comically bad in my case.