Well, my Hungary game went to hell pretty quickly.
My ruler was aging rapidly and I wasn't going to get to institute elective before he died, or at least it didn't look like it was going to happen.
I had two heirs, neither was a son since I had no kids. The first heir was set to inherit the empire title and a couple of counties. The other heir was set to inherit BOTH the kingdom of Hungary and the kingdom of Wallachia. I was going to have to play as the Emperor heir. I couldn't get enough plot power to kill off either one of them so, in an effort to manage the gavelkind mess that was about to happen, I granted the empire heir one of the kingdom level titles (Hungary).
Not my smartest move but I didn't really know what to do.
Then my wife, who I didn't even realize was preggo, pops out a son! And then another one!
My ruler, shocked and appalled that this has happened, promptly dies.
Now, I am playing an infant emperor with NO kingdom titles, NO duchies, and a couple of counties (I have the capital county at least...). My two uncles almost immediately declared war on each other and decimated the fighting age population of the empire while I watched helplessly.
I may revert to an earlier save on this one or I may give it up. I don't feel like sitting around for 15 years with limited options and an intrigue score of 0.