I have seen several outlet plugs in most households, but I noticed how mundane they were. Given my love for Star Wars, I designed outlet plugs that don the Imperial and Rebel symbols, although I have also provided an STL file where you can create your own design in the center by cutting parts of the center backward by 0.1 inches. When using these plugs, however, I do advise not pushing it all the way in due to the possibility of the plug becoming fully stuck in the outlet.
Galactic Empire Outlet Plug
Rebel Alliance Outlet Plug
Customizable Outlet Plug
Galactic Empire Outlet Plug in an Outlet
(Off-centeredness due to having to reattach arms after removing support)
Close up of the Imperial Outlet Plug
Link to STL Files for 3D Printing or Modification
https://drive.google.com/drive/folders/1Ry_H_DeyrzqKnKDaMUpMgGd0roUvH1lZ?usp=sharing
Scale all models to 100% if using Cura.