For me it depends on the editor. I usually just roll with the default. For Visual Studio and Netbeans I use light themes, but I can't make VSCode to look good with a light theme, it always feels off to me.

The argument about light themes being "blinding at night" I don't buy. If the screen is blinding you, then you should get better lighting in your room, it's not good to work in the dark.

Also, dark themes give me depression. When I open the IDE and it's a dark grayish rectangle I am like "oh no, I have to work with that again".