This was going to be a Pizza attempt; but a really weird succession of events happened to make this run... well... strange.
1: Aragon allied France; basically suppering any chance of me getting independence anytime soon. I was hoping for the Iberian Wedding -> getting Independance from Castile. I don't like to fish for starts.
2: Aragon declares war on Navaara. Alone. Castile is allied with Navaara and kicks Aragon's teeth in. Instead of taking land; they demand my freedom! Freedom without the stabhits and independance wars? Cool. But that also makes it harder to get back my Sicilian cores since 15 year truce.
3: While this is going on; the Ottomans are in a hard-fought war for Albania against Hungary and Serbia which lasted about 6 years. The Turks won; but at great enough cost that they were in debt and had rebels.
4: While the Turkish war was going on; Venice declared on Hungary, and Ferrara and Austria slapped them down. Corfu became free; and Alabnia got re-instated from their Venician province.
5: With me now independant; I swept in and took Alabnia and Corfu. The Ottomans were obviously still recovering since they hadn't DoW'ed Byzantium, so I did the totally natural thing to do as soon as I allied France for security [Castile broke the alliance Aragon had; it's back now sadly so no using France to get Sicily back...] and went and Vassalized Byzantium.
Clearly; the most standard start for Naples is 'Vassalize Byzantium'. Also clearly what I should do after becoming a Great Power is culture-shift to Greek; become Greece and get better NI's than Naples. Which isn't a big accomplishment but I doubt anyone's done Naples -> Greece before; right? I'd say form Byzantium but I'd actually need to religion-swap to Orthodox as well to do that which might be somewhat tricky and dangerous given Orthodox lacks friends.
Of course to do either of these I actually need to beat the Turks. Probably multiple times. As Naples.
Now I'm just hoping the Turks get into a war with the Mamluks; who have eaten some Baylik land and some of Qara's land since the Turks are still reeling, so I can call in Hungary who'll want his cores back and feed Byzantium.
Oh; and to add onto the weird in this game?
Poland declined Lithuania Union. Is currently losing to Teutons while Lithuania is getting attacked by Denmark [Which owns half of Novgorod too].
Siena is a vassal of Burgundy. SOMEHOW.