I find it depends on the environment. If it's a bright room (or the sun is shining in the window) I might go to the light background, otherwise it'll probably stay dark.
Related, I always figured the dark desktop UI themes (eg, for GNOME, KDE, Windows, etc) were highly preferred by people working in dark rooms, like a studio or college dorm at 3am. Once upon a time I liked these, but since I'm less nocturnal these days I prefer lighter themes.
Related, I always figured the dark desktop UI themes (eg, for GNOME, KDE, Windows, etc) were highly preferred by people working in dark rooms, like a studio or college dorm at 3am. Once upon a time I liked these, but since I'm less nocturnal these days I prefer lighter themes.