I've been a fan of the series since I first got to try it on the PS1 demo disk. And I've since played nearly every iteration.
The main problem is finding people to play with due to the game's obscurity, which stems from a complexity that turns off most new players. So I'm just taking a chance that maybe there are other AC fans here too.
Here's a vid of me playing AC: Last Raven (PS2) against a friend:
And here's the latest video from the upcoming Armored Core V for XBox and PS3: