Depends on VS version. I think 2013 and after default to dark but it’s light mode 2012 or earlier
What’s wrong with that?
Another vote for Davidoff DiS Grey Skull.
AutoCAD is pretty much dark mode as default, so I have Firefox at work with a dark theme and reader mode set to dark so I’m less conspicuous with my non-work-centric browsing. Other than that, I’m not really a dark mode as default kinda guy.