Depending how things go (especially succession) I end up with many vassals or almost none (after big revolts after succession). This usually takes about 20 years and I do it with the first or second generation. I was able to become King of Ireland and unite the kingdom several times. So far I only played in Ireland with the 1066 start date. Anyway, I spent quite some time on the CK wiki and watch youtube tutorials. Very upset about myself not having picked that one up already many years ago. I just started playing CK2 a few weeks ago and love the game.