What total conversion mods would you like to see in CK2? Thread

I absolutely love modding. I am not the best, but I'm good at it, and it entertains me more than even playing the game because I need a life

So I want suggestions for Crusader Kings 2 mods. Any total conversions/overhauls you'd like to see? I'm willing to devote my time to making them, but of course, I can't focus on too many at a time.