Euro Force was pretty good. I loved the new vehicles. and the flyable little birds with miniguns that you could fire while flying yourself was very cool. the best map on it was the one where you're fighting on the great wall of china, very action packed. but it's nothing you couldn't find on a simple 600MB mod. the armored fury was really goood to.
another good thing about BF2 is the great selection of animations. the way the players move and the way the engine is set up allows mashinima (making movies with games and animated characters) makers to get creative with there movie making. and the Battlerecorder tool is also great for mashinima makers.