What I noticed so far -sorry for the necro- is that EP does not treat me as if I'm some 'special kind of snowflake'.

I absolutely loathe how DC treats me as the saviour of the king, a true hero. And that less than half an hour in. The whole hero aura seems to radiate from me wherever I go. I guess it's only normal, from I'm slaying evils that took entire armies to bring down, saved a king's life, dealt with ancient evils, abominations and witches alike. It's really all good fun... if you don't mind a complete and utter lack of credibility.
To me it's completely immersion-breaking.

AD I like even less for it reminds me of highschool. The queen seems so... immature. As for her citizens? Well, let's just say the Altmer seem to share that trait. All of the Altmer that is. All of the time. Weren't they supposed to be haughty as a result of their infinite wisdom? Instead they're caught up in silly little schemes, romances and the occasional insurgence.
Not as immersion-breaking as the whole EP-hero theme, but close.

As for EP? I'm an annoyance to most, a tool to many and a friend to a few. No hero, no romances and no schemes. I must admit I do dislike the EP scenery though

Perfect world? EP quests, DC infrastructure and AD scenery.

Frankly they're all crap. I only choose the Pact because they fight out of necessity for mutual preservation. The Covenant (specifically the Bretons) believe they are the only ones qualified to rule the Empire, and the Dominion is nothing more than a glorified power play in order to assert Elven dominance over Man and the "lesser Mer".

And at the same time, the Dunmer are one of if not the most infuriating peoples I've ever had to experience in this game, which only places a dark stain on the better aspects of the Pact.

To be honest I wish there was a fourth option to abandon the Alliances (Provincial Militias) and join the Imperial Legion to help Liberate Cyrodiil from the Daedra and then rebuild the Empire to where it needs to be. The Central peacekeeping power of the continent.

DC has orcs, so not DC. You have to do quests were you have to talk to the morons and everything.

Aesthetically: AD > EP > DC.

Story-wise: DC > AD > EP.

Cities/Towns: AD > EP > DC.

Player bases (inclusion, skill, helpfulness, etc): DC, AD, EP. This is XB1 EU, by the way. I've not really come across any DC or AD members who I have a negative opinion of. To be fair you EP, some of the best people I've met are from that faction, but it definitely seems to have a higher ratio of D-bags than the other 2.

All subjective and based on my opinion of course.

EP had the most fun storylines. The Rift or was it Eastmarch (?) had the best for me. Whichever one had the vampire vs vampirelord quest is my favorite land.

And AD was the prettiest.

PS4 Player bases. Met a lot of rude people on the AD side (pvp) you say ANYTHING in the chat either to help direct people, praise the alliance for successfully taking a keep or get emp, or just ask an innocent question. You will be faced with a lot of unwarranted comments. And mostly people spend their time on AD insulting each other. Hence why I now don't use text chat while in Cyrodiil. Just a bunch of rotten bananas in there lol.

Oh and two days ago there was a 1v1 session that happened out of nowhere, it was me (msorc) against a stamplar or magplar? Can't really remember. But anyway, I put my mines down bc I know they'll want to jab me, he has his healing ring (house I think you guys call it?) we stayed in both of our "circles," I win the fight and this sorc on AD says to me "mine camping for the win!" And said I'm a noob for using mines to my advantage. I said to him what's the difference between me standing in my mines and him his healing circle? I told him go fight him and let me see how your playstyle is. (Maybe I'll L2P huh lol) He didn't fight. He didn't fight anyone actually. But was entitled to put his two cents in. Rant over sorry. Had to vent.

EP and DC are by far the nicest factions compared to my own. I want to switch to DC if alliance change were to ever happen.