Nice catch on Europa Universalis III, it's better with the
Divine Wind DLC though, or at least the
Heir to the Throne DLC.
Both DLCs add a lot to the game, but
Divine Wind enhances greatly the graphics (they are horrible in the original version).
There was a problem with the "cascading alliances" in DW though: when at war with someone, your enemy allies could rally up (okay, cool), but also the allies of the allies (not okay), the allies of the allies of the allies (so fucking not okay), the allies of the allies of the allies of the allies (WHAT??!!), and so on. I thought this was a bug at the time, I hope it was fixed.
edit: Forget what I said, it was fixed a year ago
I actually suggest that you try to play Flanders. Yeah I know, you don't need me to tell you to play them (:D), but I had a blast with them. Conquered all Belgium, a bit of France, a bit of what would later become the Holy Roman Empire (up to Denmark), and of course the Netherlands. I had a nice little rich empire, then France and HRE allied and overwhelmed me with like a million troops. Live by the sword, die by the sword. Awesome game. In another one I formed the Holy Roman Empire with Austria, then conquered half the known world. Muahahaha.
Haven't played it for a long time, I'm now more into Crusader Kings II, which is the same thing as EUIII but you get to manage a dynasty more than your empire (but your empire too, of course). The timeline is as such: CK II (1066-1460) -> EUIII (1450-1800) -> Victoria 2 (1780 - 1930) -> Hearts of Iron III (World War 2). They're all great and different, but my faves are CKII and EUIII. I love the Paradox studio games.