I really like the idea that the campaigns allow you to keep going even after you scored a victory. Does anybody else keep going?
I'm currently playing (against the AI) as CSA and it's late 1863. I control St Louis - Chicago - Cincinnati in the West and all of New York and most of Pennsylvania in the East. My huge CSA fleet is taking on Farragut on equal footing and I'm preparing to attack Boston - the last Yankee port on the eastern seaboard.
I've done the same rampage with the Union Army as well. Loads of fun.