2. Well, "Dark" mode on GOG is really a medium gray. (to try what it looks like, go to "My settings" and switch to "Carbon" from "Aluminum"
Also, backlit keyboards are marvelous. Before I had one such gizmo, I carried a flashlight whenever I had to use a keyboard in the dark.
I know how it looks, it's the default look after all. Ew.
Touch type very fine tyvm (bar symbols on number letters, since I so rarely use most of those, tend to have to look for any of #$%^&* but that's about it). But yes, do have a backlit keyboard, and no black on it
3. But, laptops. They have batteries. And are portable. Imagine carrying around your tower, monitor, keyboard, mouse, other peripherals...AND the (beeping for want of AC power) UPS! Now consider that a laptop is much less cumbersome. Also, you can get a laptop that can run modern(ish) games. Of course, then you have to buy a cooling pad to not fry your legs and help keep the beast cooler, but....
Ew, laptops. Why would I get something that's more expensive, less powerful, less durable, harder to impossible to poke around in yourself and swap or upgrade components (and for that matter pick components for and assemble yourself, which I did), and less comfortable to use? And why carry it anywhere? I'm staying right where I am, thanks :p