I think it's largely a matter of taste, although there are people for whom bright interfaces cause accessibility issues. Personally, I can't stand light-on-dar

I think it's largely a matter of taste, although there are people for whom bright interfaces cause accessibility issues. Personally, I can't stand light-on-dark interfaces and turn them off wherever I can, although that may be because I have an astigmatism and dark interfaces supposedly cause problems (although I'm not convinced that's the reason in my case).