Since it's late and I'm still up, I feel like providing my input on the civics. This comes from only a few games (about 6), though, so I'm not sure if some civics would be better suited for the civs I haven't yet played. For what it's worth:
Government
City States
Tried it once, and it sucked. Every time I get the chance to use it, I do some quick math and realise it will lose me too much money to be any benefit. Based on my experience to date, I feel this one could use a change - though I'm reserving my opinion until I play the Kuriotates.
God King
Used to like this one. Now, with the Khazad, I love it.
Aristocracy
Always scoffed at the idea of reducing food yield, but it fit really well with the Ljosalfar (I really only had farms on food resources and small number of other tiles) - at least until I got other civics. I would have considered it for the Khazad if not for my love of God King right from the beginning, and if I had the financial leader instead of Thorne.
Monarchy
I used to use this regularly in Vanilla or Modded Vanilla Civ. Haven't yet used it in FfH II, though, as my need for happiness hasn't been so great to warrant the cost. I think this civic could use a tweak.
Republic
I really like across-the-board culture boosts, so unless I'm in love with another of these Government civics, I'll naturally progress to this one.
Cultural Values
Religion
A good upgrade from the base civic once you get religion, of course.
Social Order (The Order only)
Not bad for a militant Order nation.
Nationhood
I've never used it. I don't like culture drains and drafting troops is not that important to me. However, I have yet to have a problem with war weariness, so I understand as soon as I get into military trouble this civic would warrant a try.
Liberty
+100% Culture? You betcha! I almost think the upkeep is too low, but you didn't hear it from me.
Consumption
I don't think I've had a game where I didn't use this one at some point. I think it's a good, balanced civic.
Labor
Slavery (Octopus Overlords only)
A well balanced civic for the OO, in my opinion.
Arete (Runes of Kilmorph only)
I'm not big on GP, but I'll use this if I'm worshipping Kilmorph - until a better civic comes along.
Military State
Same comment as for Nationhood
Serfdom
I love speeding up workers. Isn't the penalty -10% food, though... I can't remember.
However, I haven't used this much because Caste System typically comes first for me.
Caste System
Free specialist and extra culture per specialist? You betcha! I really like this civic, and also think the upkeep is too low for what you get. Or it needs more drawback (unless this is part of the double-win theme).
Guilds
Same upkeep as Caste System, but you don't get anything from it. I don't consider unlimited merchants as getting something, as QES mentions above.
I've never even considered using this civic, not even for a merchant-like empire.
Economy
Conquest
A decent civic for war-like empires.
Agriculture
Simple, and a good stand-by.
Mercantilism
I'm not a fan of this one. In Vanilla, at least you got the free specialists to make it somewhat beneficial. The loss of foreign trade would be a huge hit unless you've been completely ostracized by your opponents (which hasn't yet happened to me, so...).
Foreign Trade
I really like it. And, as with all civics I really like, I feel it may be overpowered slightly.
Guardian of Nature (Fellowship of Leaves only)
Every elf's goal! I feel it is well-balanced with the High upkeep.
Religion
Organized Religion
One of my favourites, but one I actually think is balanced well.
Theocracy
I used to use this one often in Vanilla, but with FfH, the +2 XP is really nothing. Perhaps that is because I always have raging barbs and they don't attack very smartly so my troops get XP easily.
Pacifism
I've used this when trying to get a prophet for my religion's shrine, but that's it. I'm not big on the GP, as mentioned before.
Free Religion
I have yet to use this (I'm too happy with the religion in FfH), but I see nothing wrong with it.
Crusade (Bannor only) (Loki)
Hmm, I look forward to using this someday, but I've got no input to give other than it looks like fun.
Compassion
I think all of these are fairly simple and well-balanced.
Education
Apprenticeship
I use this sometimes, but only until I can afford one of the last two. Again, I'm not too concerned with 2 XP.
Military Discipline
It doesn't appeal to me, perhaps for the same reasons as the other military civics.
Religious Discipline
Not bad. Used it for the Khazad to help get a Great Prophet. The extra happiness helped, too.
Scholarship
My favourite of the bunch, if I don't just stick with Beavis and Butthead for the whole game.
- Niilo