I made my own dark mode. I use a plug in to get a custom color palate to quickly pick from, and I loaded it with a group of colors I found on a data viz blog, for maximum contrast between all of them.
Also made a middle mouse button toolbar with tools I use a lot, with some attention to submenus, too.
I Set F1, F2, F3 etc through F6 to toggle GridSnap, Ortho, Planar…Gumball, in the order they’re shown on the bottom of the window.
Many many custom hot keys. For various selection commands like SelLast, SelCrv, SelOpenPolysrf, etc. Example: Ctrl-5 is SelCrv, Ctrl-Shift-5 is SelClosedCrv, Ctrl-Alt-5 is SelOpenCurve, same theme for polysurfaces.
The most recent addition, which I use a lot, is ctrl-alt-G for _RelocateGumball, because I hate clicking at that little white bubble and having to click again.
Some of the ideas for doing these things came from a Jean Gorospe tutorial on PluralSight. Worth the one month fee if you’re a beginner and you want to get faster. It changed my life. https://www.pluralsight.com/courses/learning-work-quickly-efficiently-rhino-1850