Just a simple one, but Auto Accept Indulgences is a damn life saver. Should be part of the base game.
Crusader Kings
I originally bought ck3 solely for elder kings 2. I prefer the original game over it now, but it'll always hold a special place to me for pulling me in, lol
For CK2, After The End is always a favorite of mine. I believe the CK3 version is currently under development.
I haven't tried the new one for CK3, but it is legit the best total conversion mod on CK2 I tried. Very interesting and detailed.
I would say that RICE and VIET are my favourite mods. They mix in with vanilla well, and just bring a bit more depth to the game.
Asia Expansion Project!
So I look at this all the time. Is there enough flavor to make it different or fresh from Europe?
New religions and culture, as well as clothing, units, characters and art. There are also some region-specific events that can pop up.
It does suffer from the same problem as all of ck3, which is that it isn’t different enough from Europe.
After the End.