My Bra->Pru->Ger game. Got boring pretty fast although supplanting France with the Dauphaine was hilarious.
ARG->SPA game. The French-Burgudian wars are great. They take turns declaring war on each other every couple of years and ravage anyone stupid enough to be allied with either of them, then white peace out with each other. Ohh and all of Frances Balkan terriorties came from them Inheriting a mega-Hungary.