Well if you like it a lot and they do some good DLC you're almost good for a decade.I'll need to look into specific domains for sons to marry my daughters to, normally I just use the filters, I think you can quickly narrow it down to who will accept a matrilineal marriage. I haven't been targeting different rulers, though that might also explain some of the territory I've gained. A lot of next in line to inherit places.
I'm going to browse through the CK3 subreddit, see if I can glean any useful info, definitely getting to grips with the basics of the game but still sounds like there are a lot of smaller specific things that need to be learnt.
1000 hours, I can see me reaching that in CK3 but probably only around a day of playing so far.
I started on Paradox games back in 2009.
CK has RPG elements and it's a very unique game. Throw in D&D mods and Game if Thrones mids and yeah it's a great deal.
Reception of CK3 seems really positive as well but it's the crown jewel in the Paradox collection.
It was CK2 that broke through to the mainstream.