My first republic game will consist of giving some unlanded fellow in the ERE a city, then a duchy, then going about attempting to reform the roman republic.
I think I'll start as an Italian Republic and do the same thing. Trade posts all along the adriatic, then conquer the neighboring cities, then the counties themselves, then whatever duchies I can claim. That should put me in a solid position to form Italy, and from there, it'll be condottieri Legions marching across Europe.