Not the guy you replied to, but for me it... just is?

I love everything about it. The OOB and the grand encirclements. Starting a custom game and rebuilding a nation from the ground up. Defending a crucial province with careful rotation of divisions and massive amounts of airpower. Losing an armour division after the AI manages to cut you off. Seizing key provinces with Marines. Just pushing the line and barreling through defenses with armour. The fact that the AI is suprisingly competent.

I just love everything about the game. It is, to me, the perfect strategy game. I would love if they could actually remake it with bugfixes and a better AI, but since that probably won't happen, I will continue to call it the best grand strategy game of all time.