I have 400+ hours into EU4, another 400 into Crusader Kings II, and probably 1k hours into EU3, and somehow I'm still not tired of Paradox games. This game offers a level of depth unlike any other strategy game you've played, but I will say that it can be difficult to really comprehend all the decisions you're making as a new player - hell, I'm 400 hours into this and I'm still a newbie as far as I'm concerned!

Great to play, great to watch Let's Plays of on Youtube.