Zappo
Explorer
Thanks for the "mostly" qualifier. "Mostly" shades of gray, that's how my campaigns work.
The vast majority of common mortals, including villains and heroes, rulers and anarchists, fall into some sort of shade of gray.
However, there are many creatures who tend to be rather extremely aligned. Undead, outsiders, dragons, even exceptional mortals, may be more extreme in their good, evil, law or chaos than most people would find realistic.
Finally, there are several creatures (typically powerful outsiders) who tend to be extremely aligned one way or another. Some of them can be so extremized that sane mortals can't quite understand their mindset - acting their alignment even against their own interest. This is beyond black & white and entering unknown regions of the spectrum.
The vast majority of common mortals, including villains and heroes, rulers and anarchists, fall into some sort of shade of gray.
However, there are many creatures who tend to be rather extremely aligned. Undead, outsiders, dragons, even exceptional mortals, may be more extreme in their good, evil, law or chaos than most people would find realistic.
Finally, there are several creatures (typically powerful outsiders) who tend to be extremely aligned one way or another. Some of them can be so extremized that sane mortals can't quite understand their mindset - acting their alignment even against their own interest. This is beyond black & white and entering unknown regions of the spectrum.