1. Tahiti
I don't like starting location? Embark. I can have cities randomly distributed around the world? Sign me in. Did I mentioned random element? Other bonuses create a nice background to the main ability.
2. Phoenicia
Rrandom luxury from Sea Market and bonus from We Love the King... Anyway, it is the only civ that makes me go on resource hunt and therefore every game with them is unique experience. AI doesn't handle them best, but it is actually historically adequate.
3. Mali
So, they are basically very strong from every side. Glorious Economic/Military civ with Composite Bowman unique replacement. It is very easy to focus on conquest with strong economy, Mali results in relaxing game. And you got random luxury from UA.
4. Sioux
Grab as much land as possible and get random unit each ~30 turn from every horse resource. Would be perfect if magnificient AI weren't replacing Tipi (1p, 1c, 1f) with Pasture (1p) forcing me to make this improvement permament. Simple and successful, AI usually is doing well with Sitting Bull.
5. Mughals
I haven't a pleasure to play them yet, but creating Great Merchant without internal scream (Nooooo) is something truely attractive. It seems to be very strong civ in terms of peaceful, lazy, passive pre-modern game.
6. Scythia
I have just played them and this one turned out to be completely magnificient. Herdsman messing up with other civs is something... just different. Oh, filthy Scout is nearby, let's make him a surprise. In addition you can steal workers what is incredible useful. Pillaging own territory by mistake is also funny. Trait ability is also less passive than it seems, you can move your cavalry to distribute bonuses adequate to your will. Maybe I should put them higher.
7. Hetmanate
What I like is building Citadels without consuming a Great General. Before I edited policies, I went straight for free GG from policy, settle nearby enemy capital (Moscow

) and they had no chance. Pillaging bonus is also nice when you develop some cavalry, other benefits from warring is always interesting.
8. Lithuania
Probably the only reason why so high is that Great Random beloved this civ and I played it the most times through all my civs (in terms of modded, they are on surpass with Sumer, other chosen one). What's so funny about them? Lithuania almost forcing you to settle aggresively (settler, shrine, monument, archer is all you make in early game), which results in extremely exciting 60-100 turns, where you got multiple DoW.
9. Tatars
Mostly I love how AI handles them, they are the last civ I lost capital to. Extremely friendly with strong army so I decided to attack other neighbour. In one turn suddenly, the massive army on the border, second DoW (not something like usual 5-10 turns before magnificent AI attacks), I didn't make it back to Capital, but I retook it with imba Hetman. Back to playing them, the mass Czambul attack is actually my favourite part. After initial attack they are quite useless so don't mind losing them in suicidal combat and rebuild. Claiming neutral lands is also nice to secure some interesting spots for settler or get luxury.
10. Olmec
Unique scout with ability to reveal all Ancient Ruins in 6 radius. I could stop writing now, but other bonuses are neat as well. Maybe monument is too similar to light version of Shoshones' UA, but it has actually sense if you cannot buy a plots in uncontrollable puppets. It is also interesting to decide when/if to annex certain city.
11. Nepal
Very map dependent, but last game I played with them I have good memories so it is why they are so high on the list. Never build a single Gurkha though, but they makes some interesting spots valid for settling (for example... plot adjacent to 5 mountains

).
12. Gallia
In the game, where early warfare is non-existent, Gallia made it happen. With proper luck, Barbarians will do the major part of job. I remember the game, where I get rid of Ethiopia before they found a religion. Later you can made some solid army from Unique Units.
13. Papal States
Simply, in my case founding a religion is not a matter of investment or work. I need a luck or proper civ. Papal States do not care about Shrines, just wait.
14. Khmer Empire
My first civilization, actually I have just reverted back Baray bonus so they are identical with the release version. Proud title of unchanged civilization goes to them (second place I bet took Romania from set 8; considering the time as main criteria). What is Khmer about? The Mega-City, which I always fail to make. Mathematically Tahitian bonus is more useful and doesn't apply only to Capital. I may need to consider buffing this civilization one day.
15. Numidians
The ability to build any available land Unique Unit in game. Desert start is also a nice thing.
16. Timurids
I have actually never made use of UA, neither saw the AI conquering other Capital (as not last city). It turned out that Espionage bonus from Madrasah is what making them interesting. Catching up with technologies is very easy that way and you have not to pick Autocracy to achieve it.
17. Qin
Not played yet. I am looking forward for it, observing what AI is capable of do with its ability. At last, something to break the "magnificent power of cities designed by Firaxis". I haven't yet pleasure to be DoWed by them (I mean, real DoW with units in my borders). In theory, you can't buy a Walls/Composite Bowmans, which should result in losing Capital if not prepared (which should be a standard thing...). Barracks seem interesting as well.
18. Sparta
Not played yet. I am quite sceptical if trait is gonna make Melee units actually useful. Civilization is epic though.
19. Scotland
One of the lazy civilizations, I remember when I entered Industrial era with Archeology (making Louvre with Engineer), everything was planned so well... except the fact that I was forced to pick Metal Casting as free tech x<. Anyway I believe that new UA is much less passive than old one, allowing to plan something interesting for Industrial Era.
20. Durrani
My favourite civilization, pear of the pearls, my avatar etc. It has my the most late game unit replacement (Infantry). Other bonuses are related to Great Writer, but they are not enough to put this civilization high on list.
21. Bulgaria
I wanted badly to make UB a library with Scientist slot. It is balanced, but unfortunately It automatically took the opportunity of creating strong UA... which I finally made after all. It benefits from Research Agreements, boosting Culture of both sides (50% of CPT of other side, I am gonna change the formula probably). Why so low? Because I have no tendency to play serious games.
22. Vietnam
Not played yet. I have straight plan on how to play, Composite -> Crossbowman conquering everything, got DoW by everyone, survival mode. I think I am gonna made Fire Lancer a bit more interesting than row bonus combat though.
23. Hittites
Yes, my beloved Influence from intimidation since beginning... except good luck with that, nobody is afraid of you. However, AI is very pleasant to see.
24. Romania
Well, Romania is very interesting (what City-States I am gonna met) until you meet two first city-states. Nothing special later.
25. Tibet
It is actually so generic that It could be Vanilla civ. I put to little work into Kum Bum, it has to be more interesting. Anyway, another lazy civilization only for lazy afternoons. AI is very treacherous and expansionist, in this aspect I didn't failed.
26. Ashanti
This civilization is about one Great Work you got at start, that has 20(?)% Combat bonus aura. Ashanti aren't truely encourage to do anything special, but for sure one of the more balanced civilizations.
27. Haida
On Immortal, Trireme warfare is not existent. Culture from Military achievements is nice, but Aztecs already cover it. Naval Melee units attacking land are saving this civilization. I like the concept, something truely out of box.
28. Zimbabwe
Even though I like the ability, it is hardly exciting or even useful in most scenarios. I hope that change to unique building will add some flavour to selecting Trade Route destination.
29. Cherokee
I am actually quite curious how my "Diplomats "steal" technologies" system work. Other than that... Cheeeerokeeee :[. Mighty Cherokee found religion and build Parthenon.
30. Kingdom of Jerusalem
Oh, somebody had to be the last. I believe that design is very historically adequate, without too strong focust on conquest, but Baldwin lost a lot in terms of fun since first version. I accidentally found some music to recompense the last position

. Well, this revision is probably result in editing Jerusalem (Tibet, Vietnam, Bulgaria (nerf), Khmer (buff), Hetmanate (just had a glorious idea)).