I find it makes whatever I'm doing more focused. That said I would like to see what dark mode on other apps would look like. Pixelmator tries the dark mode look but I don't think they have it right.I have before but it makes the menu and dock look very out of place to everything else which is grey and white. I find white text on dark background easier to read, but since it doesn't effect Finder, Safari or anything else, it does little good for me.
...and bringing back the menubar shadow!I use Dark Mode, simply because I spend 85% of my day in Adobe apps, where I have the GUI set to Adobe's version of "Dark Mode."
I don't actually spend a ton of time in the Finder, but I agree with the sentiment that Apple really needs to complete the Dark Mode by adjusting windows to match.