Do you ever notice the interface because it got in your way of accomplishing your purpose?
What do you do about it?
I try to improove it's design. With this effort I start a conversation that could grow into a revision, or I just improve by calling it practice. Either way I try to improve UI.
Here are principles I've developed that lead to ideal interface design.
Below you will see some very old and a few new tries. I can't help but practice improving the interface between human and machine.
Design
Autodesk Inventor
I use this software daily and popups constantly get in the way. I designed a tool feed that works like a notification feed.
Blender
Blender 2.7 was notoriously in need of in interface overhaul, so I tried.
Soft, dark, professional, clean. New outliner design, icons, and window management.
Then Blender 2.8 implimented many of these designs!
So then I took it to the next level consolidating all the various interfaces into a single everything window.
Here's my concept design for the Blender 2.8 3d Manipulator, as I found the placeholder widget... in desperate need :)
The elegant 3d model in the center quickly tells the artist what angle they have. The shortcuts can be set by clicking the menu button in the top right. A better replacement has finally been implimented in the latest version of Blender.
You of course have your hotkeys profile set up as your default, but if you hit almost any key or mouse button while hovering over a tool button or menu option, you have temporarily assigned that key to that tool, until you hit escape. This way you can load up a handful of keys for quick switching for a particular task. Blender and your keyboard/mouse would then become a palette for Modeling Sculpting and Painting.