after almost 1000 hours of world conquering all I can say is wow. this game has brought me nothing but joy through the years and it never dissapoints with the constant updates (and a little pricey dlc's :P). honestly i think this game fits both casual, competitive, online and oflline players as long as you enjoy history, geography, being a dictator or just conquering the world.
I do recommend buying this game but i admit that it is a bit expensive so you can always wait for a sale. Just know that if you buy this game you will be in for some long nights playing eu4.