The Diktat is
definitely a dictatorship—I'm not arguing that. A scary dictatorship ruled by a megalomaniac! But all of the major factions (barring the Persean League, who aren't in the campaign yet) are dictatorships. The Hegemony has a sort of Potemkin system of civilian democracy, but it's subordinate to a military dictatorship using a perpetual state of emergency to maintain power. The Church is simply a theocratic dictatorship. Tri-Tachyon is effectively a corporate dictatorship.
Real-life dictators that get less publicity than more infamous ones simply means the public at large are less aware or do not know of any depravity the tyrants may be guilty of. Broadcast news does not (and will not) cover everything you need to know, especially if they have an agenda.
This probably isn't the right thread for this conversation, but . . .
Spoiler
Again, there are a lot of different types of dictatorship. Jordan is a very stable dictatorship (nominally a constitutional monarchy, but the king has enormous power) with a very good human-rights record. North Korea is a completely totalitarian hellhole. Nazarbayev, the ruler of Kazakhstan, is merely a corrupt, greedy crook; al-Bashir, the leader of Sudan, is a genocidal maniac. We shouldn't lump them all in together. I also don't think it's reasonable to suggest that, in an age of social media and easy peer-to-peer communication, anybody is able to hide evidence of Nazi-style atrocities for long, with or without the complicity of the media.
(In fact, I think that what the Nazis did—in terms of its scale, its purposefulness, its thorough organization—has only one real counterpart in modern history, that being the reign of the Khmer Rouge in Cambodia. What happened in Sudan, in Bosnia, in Rwanda, etc. is absolutely horrifying, but those atrocities are a lot less aberrant in the context of human history than we'd like to admit. But that's definitely a topic for a different thread.)
Oh and to actually go on-topic for a change: I definitely tilt towards the Hegemony. Looking forward to seeing the Persean League, though!