Favorite nations so far?

[Nerfix]

Mine are

Early Agartha:

Oozes with flavour and I like playing them. Rhuax Pact is lovely and Troglos rock.

Early Atlantis:

I really like it for some eldricth reason I can't put my lantern organ on.

Late Atlantis:

Too cool. I really like their units, the theme, the flavour, all of it. They're kinda capital dependant but I really like it.

Late R'lyeh:

Ftaghn. That's "word" in r'lyeahian. Actually it's "waits".

[Ygorl]

I had a blast in the test game I made with late Atlantis... Also, I was amused to have to send two rotting assassin bears to kill a Hoburg Hero, since he dispatched the first one I sent without a scratch!

[dirtywick]

I can't wait to get my hands on the full version, but with just the demo Kailasa. I haven't been able to play Atlantis with much success yet, I'm still working out strategies with them.

[Archonsod]

EA Ulm
EA Caelum
EA Abysia
LE Atlantis

Haven't tried them all yet though. Haven't moved into the mid or late era's beyond a quick look either.

[Shovah32]

I like:
Late Atlantis
Late Rlyeh (they ROCK!)
Jomon (ninjas with shurikens kick ***)
Yomi (Dai oni can cast invunerability, soul vortex AND fireshield)
Middle Marignon (good access to those big angels)
Early and Middle Agartha (they are just plain fun)
Early Abysia (kickass sacred troops, blood/astral combo, amazing assasins)

OK, so what if my list was a little long?

[Archonsod]

Would probably be easier to list least favourite nations

[KissBlade]

Late Ryleh (a bit too good IMO actually), Mid Ryleh, Early TC, Jomon, Yomi. Haven't played too much of the others yet though Patala is a bit intriguing with Nagahs and Sauromatia with the zons.

[Twan]

Late Rlyeh is really fun.
EA Ermor is also one of my favorite as you can really do anything with it (big living armies with well armored troops + healers, bless strat with cavalry, going death & summons or focusing on artillery magic or alteration/thaumaturgy for your astral mages, etc... you can really play it as you want, all ways seem efficient).

[PDF]

I really like the various "japanese" nations - EA Yomi, MA Shinuyama, LA Jomon.
They're well done, rich in strategies, have nice special spells and creatures, and are rather powerful (at least EA/MA, I'm less sure for LA).
Didn't try everything at all, and should try R'lyeh for sure !

[KissBlade]

Jomon is definitely one of the stronger late era nations. They have really versatile mages and you can get away with a pure samurai archer army for a long long long time ... Just make sure to capture surrounding mountains first...