It's the year 1461, I've managed to form Spain as Aragón.
The North African states were my first targets, and after chomping tons of land from them, Morocco split into Fez and Morocco(talk about some serious damage). I attribute this to the fact that I'm a bloodthirsty conqueror who likes to wipe out every enemy army... leaving the enemy with nothing for a few years to repel the HUGE rebel stacks that form. National collapse becomes immediate.
Over time, I conquered territory all the way from Sus to Tripolitania, with a few holes in my territory thanks to Tunis. All the North African states sans the Mamluks are now my vassals(and they like to sponsor revolts in my territory... *glare* ).
My first war was against Aquileia and Sardinia, in which Sardinian was annexed and Aquileia lost half it's territory - filled with gold - to me, thus giving me an economic boost. From there, a few accidents occurred. Venice and I allied, and we went to war against the Turks in several successive conflicts, resulting in Bulgarian independence, the growth of Venice's Greek Empire, and eventually the seizure of Thrace itself by Aragón. Successive conflicts saw disconnected Morea(with not only their home territories, but Rhodes, Crete and Kaffa!) and Wallachia break off from Turkish rule, and the complete collapse of the Turks to a single province. Bulgaria would have the honor of taking that province and annexing the Ottomans, though they'd lose it shortly after to the Karaman independence movement.
I turned on all my allies at some point. Portugal was a huge friend of mine in taking over North Africa(Sicily even got a stake in Africa too in the great war), but they sided with the enemy - Castille - at one point, and paid the piper for it. Castille was defeated thanks to NAVARRE. Assaulting and attacking Navarre's lone province demoralised the Castilians enough I was able to drive them out(only after they annexed Navarre, my poor ally... but they served their purpose at least!), and gradually reduce their entire army to nothing. Portugal saw the same fate occur, and a Pax Iberica resulted. Navarre would break away from Castille, and become a large state that it's height controlled all of Northern Iberia from Galicia to Navarre... though France would end that moment of glory.
Bulgaria was an ally of Aragón after they were released from the Turks, but they eventually turned on me, and as a result, they are now being eaten by Poland.
Italy is self-explanatory. Italy was unified thanks to Milan, and I was sure to damage them afterwards by excommunicating their ruler and declaring war. Rome will be ours in no time!
The full story can be seen in my story "Los Reyes de la Tierra, El Mar, y el Mundo" (The Kings of the Land, the Sea and the World) that is also in the All Other Games forum.
On religious progress, I passed the Advancement of the True Religion Act and have converted most of North Africa sans 2 provinces or so. I'm working on the Balkans now, and I hope I can get it all before my theologian dies...