The earl of Dublin has a nice learning curve, because your father dies early on and you inherit his earldom nearby, which gives you enough points to create a duchy and fight wars for claims on nearby earldoms. It might be a little too easy for some people, though, and many people complain about not knowing what to do after uniting Ireland.
Personally, my first playthrough was as one of the few Christian counts in Sweden, and it was pretty enjoyable, though you always have to worry about Norway. A lot of people suggest playing as Denmark, because you start off really small but have plenty of opportunities to expand.
Personally, my first playthrough was as one of the few Christian counts in Sweden, and it was pretty enjoyable, though you always have to worry about Norway. A lot of people suggest playing as Denmark, because you start off really small but have plenty of opportunities to expand.