Error 406

Even though 404 is still the most popular one, there are 38 more client and server errors.
I do believe that in good design one of the most important roles is being played by tiny details, little user delights. Like error pages for example :)
It doesn't take much effort to design and implement something better than a default browser response but such things add a human touch to the interface.

Check my Behance for the full project: https://www.behance.net/gallery/54623129/Error-pages