Probably POPs in the first place (like I said one time before, my favorite game was as Siam in Vic2, where I was trying to modernize my country by having lots of teachers and educating the population, and then they decided to revolt against me demanding elections and civil rights. I crushed them, just to see a lot of my progress towards modernization, like 2.0% clergyman ratio, go backwards after my soldiers killed the rebellious teachers. So I had to give up and concede rights to the people. Only game where this actually made sense at all, where complete dictatorship from the get go might not be the best option, where it seems you're actually guiding a population with their own needs and wants).
In the second place, diplomacy in EU series. I love that the AI remembers that I helped them, and the more I help them the more loyal they are to me. I love that I can fund rebels and these rebels will not fight my armies and if they set up their own nation, they'll be friendly to me. Also, I love how all that friendship can be lost once a change of regime (let's say, from monarchy to republic) happens. Lots of games are about painting the map your color, but only Paradox games made me care about my allies, joining their useless wars so I could get street cred from them.
In the second place, diplomacy in EU series. I love that the AI remembers that I helped them, and the more I help them the more loyal they are to me. I love that I can fund rebels and these rebels will not fight my armies and if they set up their own nation, they'll be friendly to me. Also, I love how all that friendship can be lost once a change of regime (let's say, from monarchy to republic) happens. Lots of games are about painting the map your color, but only Paradox games made me care about my allies, joining their useless wars so I could get street cred from them.
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