What's your favorite M2TW faction?

[RTKBarrett]

Russia, still highly undrerated... sooner or later ppl will realise they are more flexible than what they give them credit for

[Paolai]

on high France for their strong HA and cheap pikes.

[Stig]

Spain on low money

Tercio Pikemen, Arquibusiers, Swords Militia and Gendarmes

[IrishArmenian]

Russia, still highly undrerated... sooner or later ppl will realise they are more flexible than what they give them credit for

Same with me. Has mobility and power. The most flexible faction in the whole game and in my opinion the best.
Heavy Infantry: Berdiche Axemen, Dismounted Druzinha/Dismounted Boyar Sons all have the Armour Piercing trait.
Light Infantry: Woodsmen also have the armour piercing trait which can level the playing field against better armoured foes. A low armour rating is nullified by an attack of 13, and this unit is available from the early era!
Skirmishers: Dismounted Dvor. They can double as infantry to a degree. The 10 missile attack and 10 melee is an extreme value to any commander, no matter what the tactics or playing style. Cossack Musketeers are a force to be reckoned with. After destroying many enemy units before exhausting all ammunition, they can defeat the pathetic, demoralised survivors with their swords.
Cavalry Skirmishers: Dvor are excellent, with the ability to defeat lighter opponents in a fray or to pepper heavier enemies with arrows before destroying them in close combat. Kazaks are the basic horse archers, but Cossack Cavalry truly shine, they are incredibly mobile, always able to stay out of battles. Boyar Sons are a little weak, but javelins are always effective and they have axes for armour piercing.
Heavy Cavalry: The one place the Rus are really lacking in, Druzinha is the only unit one can recruit in this category and the Tsar's Guard is quite effective, but expensive and only available in the Late Era.
The Rus' excel in skirmishers, but remember that many of the Russian skirmishers can also hold their own in close combat as well.

[Gawain of Orkeny]

Turks, Tims and Byz. All good archers and dual units plus lotsa HA and fast cav.

[Incongruous]

HRE: Rieters

[Lorenzo_H]

Spain, because they rule allround. And plus, Jinettes! The best cavalry easily of the entire game. Nice Musketeers, solid Heavy Infantry, Pikes, Heavy Cavalry, got Conquistadors and have the best starting location ever.