Edit as of a year later: I don't know why, but I feel like revising this list and removing those games published but not made by paradox.
1. EU4: The defininitive Paradox game. This is what Grand Strategy is.
2. Ck2: Medieval RPG where you can screw your sister, murder your children, and conquer the world. I guess there is other stuff too....
3 Vicky2: Complex in all the right ways (except that world market). Feels undercooked, but even then is still an amazing game.
4. EU3: Great game for it's time, was the Paradox game until Vicky game along. Eu4 was, after much patching, a massive step forward in everyway though.
5. HOI3: Many fond memories, but horrendously buggy/broken/complicated. But in a fun way.
6. Stellaris (pre Utopia): Rather barebones at launch, but it's gotten better and I'm hopeful
7. HOI4: This game feels like an early access. I like many of the ideas that went into it, but the AI is completely unsuited for the game. Kaiserreich is the only reason I haven't deleted it.
8. Sengoku: CKII with the fun stripped out of it. Though this game supposedly provided a good launching platform for CKII, so we should all be thankful it existed.
9. EU:Rome: What on earth is going on here anyway? What is there to do? Where's the fun?
Not ranked:
HOI2DH: I feel like this is a game I would have enjoyed had I encountered it earlier, but having picked it up in late 2016 just for the purpose of playing the original Kaiserreich, I ran away quickly. I can't fairly judge this game.