After being in the game for 20+ years I have quite a huge archive of things I have created. Not necessarily for clients and not necessarily completed or even surfaced in any way. Sometimes it's just an aspect of a project that I still like, or a photograph. So I built a gallery for these artifacts and will keep adding items when I stumble across them. Colors, sizes and order are randomized so the site will always look different. And you can filter by category.
Only because I am a fairly lazy person (and a master procrastinator when it comes to keeping personal projects alive) I also built an upload form that adds items to the show. Yes, no need to use the backend. I am not even sure if it's significantly faster this way, but so what.