If you could add just one more faction it would be...

[Pindar]

Make your choice.

[King Ragnar]

Gota be the Teutonics Knights, wouldnt have minded wales either but they arent on :(

[Barbarossa82]

Serbia. They were an important kingdom at the time I believe and important to challenge whoever wins out of the Turks and Byzantines.

[A. Smith]

Burgundy. there were a pain in the butt of france and a precious ally for the british, and, as weve seen on the campaign map screenshots, there are numerous rebel factions in france that could have been considered burgundian.

[CountArach]

Serbia.... because Serbs are awesome (No I am not Serb)...

[Leet Eriksson]

There is no "Other" option :| but anyways.

I'd like a pagan faction like the Prussians.

Or maybe Lithuanians.

[Furious Mental]

Enough with the Catholics. Baghdad Caliphate!

[Tiberius maximus]

i wish you would have put irish up there, but oh well

[Keba]

Cumans, naturally ... can never have enough horse archers.

Plus, they would be the only pagan faction around, IIRC.

[Midnight]

A playable Pagan faction would have been nice.

[Darth Nihilus]

Teutonic Knights all the way. I love the crusading orders.

[AliAS]

Teutonic Knight will be GREAT

[Ibn Munqidh]

Baghdad Caliphate, the Abbasids, whom still had some prospect of breaking away from the Turkish grip at the time of the beginning of the game.

[IrishArmenian]

Damm, No Irish up there. I voted for Armenia. It would be Cilician Armenians, yes?

[Quid]

Well, obviously quite clearly the Swiss.

Quid

Edit: Not given as a choice so I made me own and refrained from voting up there...

[The Spartan (Returns)]

what there's no Irish?
if not then Irish or Swiss.

[PorT_Lobo]

Lithuania shoulded be in. They were a major house in Central Europe in Medieval times...

[The Blind Samurai]

calaphite should be in

[Martok]

I voted for the Baghdad Caliphate. They were probably the most significant Muslim power at the time (roughly analogous to what Constantinople was to Christianity), and another playabe Muslim faction would certainly have been nice.

If I could've voted more than once, I also would've included Aragon and Kiev. I like having Aragon in the original MTW, and Kiev would've added another Orthodox faction (I like that VikingHorde's XL Mod includes them!).

In addition, I wouldn't have minded seeing Lithiuania as a playable faction--gotta represent those Pagans.

[Underdog687]

Teutonic Knights even though they are a sect off the HRE.

[King Henry V]

Ireland? They were just a disorganised bunch of tribes vying against each other for the top place? If Wales is not in the game, the Irish have even less right to be in there.

My vote goes to Aragon. I can't believe they aren't included. True, the were the secondary faction during the Reconquista, but they also heald many possessions on the Mediterranean such as Corsica, Sardinia and Sicily.
The Teutonic Knights would be fun to play, but they had no where near as much impact as the Aragonese.

[BaldwinIV]

Bulgaria rulz!
I want playable Bulgaria with only one province. It will be a great challenge.

[Underdog687]

Bulgaria rulz!
I want playable Bulgaria with only one province. It will be a great challenge.

Bulgaria would be fun to play with, ally with the British and ....

[Silver Rusher]

I think I would say the Flemish. Unique faction, trading capital of the North, very important in crusades (Latin Emperors were Flemish for example) and owned some very important cities.

Bulgaria and Serbia would be nice but only one out of those two would be necessary.

Same applies to Georgia and Cilicia/Lower Armenia.

And Lithuania and Cumans.

Kiev would also have been good.

Burgundy only really existed much later than the campaign's start, but they would work well as an emerging faction.

[Orb]

Armenia as a fun campaign in itself, Serbia/Bulgaria for overall gameplay or Makuria for flavour and pressure on an Egyptian superpower.

[Orda Khan]

Too much emphasis on Europe......and sedentary factions in general. We have never had the opportunity to campaign as any nomadic force in the Mediaeval offerings so far. The Qipchaqs/Cumans should have made the list to provide this opportunity

......Orda

[The Wizard]

Bulgar Emirate, or failing that Kiev considering Novgorod was never a real regional Russian power (preferring to limit itself to its Baltic/White Sea demesnes), and for some added flavor in that fine mix of nomadic, sedentary and Viking power.

[Stig]

If I would add anything I would increase the new world.
Maybe add North America with the Natives that live there.

But then if I could I would make an entire option to travel to the new world. (new map, but still a bit the same campaign, you're ale to travel to the new world and back to the old world), take in mind that by the time you can travel to the new world you will have loads of Europe.
You can then take loads of America: entire Caribean, Mexico and a big part of North America. But this might be better for an expansion, then adding this in this game, things might get too big.

[SpencerH]

The Sidhe.

[Mount Suribachi]

None of the above. I would go for Genoa.

If I had to choose one from the list, I would go for Burgundy to add a little extra spice the French-English thing.