I played about 60 years as the Duke of Moray -- the heirs of MacBeth. Great game.
I expanded into the Duke of the Isles territory, and a little into ireland. Then I declared independence from the ignorant Dunkels and won my freedom. I had a hiccup when gavelkind inheretance split my realm up among my two sons, and the second son who took the isles immediately pledged himself back to Scotland. I had to clear that up with another war.
What followed was years of epic wars between me and the Scottish King. I would declare war and pick off some new territory, mostly using claimaints. He would declare war to take it or some other piece of land back. Eventually, I hit over 50 percent and usurped his throne.
Then the epic wars got more intense. Neither Scotland (now Albany) or Lothian would pledge to me. So I kept expanding into their land, and they kept attacking one after another -- often to take the crown for them or a claimant. Each war eliminated another stray claimant to my crown. After some time, I found a claimant to Lothian and brought them back into the fold.
Right now I've taken a little over half of Ireland and seized that crown. I inherited claims on the Duchies of York, Lancaster, Northumberland, and Herreford from my king's mother. (Funny story, he's the son of my former second son who inherited the isles and had to be disinherited. His mother also killed the third brother in that group before that inheritance. Anyway, when my current king's cousin took over, he had two children until the grandfather of my current king, duke of york, killed both of them with assassin spam. Then the king died and left me as the current king as the only male in the dynasty alive. Worked out better I guess. well, except that my king now has a nasty ratty hipster beard - very sorry to see that DNA get into the royal line.).
So with all of Scotland except Albany under control, we're now fighting epic wars with England over those northern duchies.
Great fun.