It would be nice to see more historical mods, like in example XVI-XVII century and Polish-Lithuanian Commonwealth.
http://en.wikipedia.org/wiki/Polish-lithuanian_commonwealth
In this period Poland was one of most powerfull countries in Europe, fighting with almost all neighbours - Sweden, Russia, Turkey, Cossacks.
Huge possibilities and interesting units like hussars (heavy armored, polish cavalry with wings on their armors), turkish, swedish armies, groups of deserters, steppe nomads - Tatars, a lot of mercenaries units ( german, scottish, swedish, hungarian (mainly infantry), equipedd with halberds, pikes, bardiches, muskets).
Plenty of different wepons, including firearms, bows, polearms, and of course SABRES, SABRES and more SABRES.
Pity that i sucks in modeling and programming
(P.S. - Before you'll start blaming my spelling and grammar, I'm not native english speaker - my polish is much better
)