soundtrack was good, too
http://www.youtube.com/watch?v=SQsWpcwvmI0&feature=related
Oh Ya! AC has some of the BEST soundtracks for a game! Zero, Unsung War, and Megalith are my favorite songs from the series (sometimes I'm playing Zero while I fight on AHII

).
Aside from the Storyline in each game, and gameplay, the coolest thing about the AC series is that every game kinda flows into each others in one way or another. Unlike most series where each game has it's own story, AC takes place in the same world, but in different years! AC0 was the Belkan War that later leads into the AC5 storyline where the Belkans are trying to destroy Yuktobania and Osea by making one another fight, and then AC4 is about the war between Erusia and North Usea. Now AC6 is out with the War between the Republic of Emmeria and Estovakia!
I have a map of the AC World, and from time to time I like to just look at it and think about what battles took place where and who was involved, and the Pilots that fought there and how AC# was fought here with these countries, and AC# was fought there with those countries.
The creators of this series are pure genious!