Hellsbells, that's a tough one. England for Longbowmen, Turks for Janissary troops, Byzantium for Varaengan Guard and if you get swordsmith guild in Constantinople you can hold off the Crusades and Jihads forever, Milan for spear militia, Venice for the same reason plus I like their colour haha, Poland for the Strecznys, Denmark for been able to take Stockholm quickly, Scotland coz I'm Scottish and for the pikes, Papal States for the Papal Guard, France and HRE I've never played a proper campaign with them after 3 years (didn't have the patience to wait for Scots Guard until now...just about to start a game with France, don't like the Mongols, but want to give the Timerids a proper go.

If I have to pick I suppose it's England. rampaging through the world with my trusty Longbowmen is a blast and they are the only Nation I have completely taken over the world with.