Always hated Fifa. Didn't feel like you were playing a football game, more an arcade game where everything what's going to happen is fixed and predetermined. But having played the 13 demo, it's so much better than 12 (actually bought it as well next to PES, because PES has disappointed me way too often since the mighty PES 5 and 6 days).
It feel more free flowing, the ball seems to be an object on itself, and not something that's a part of the animation of the player (something FIFA always lacked compared to PES, and main reason I am a PES player).
If anyone in the UK wants Fifa, GAME have a good deal. You can pick up Captain America on the 360 for £5 from Blockbuster if you can find any. Buy 2 as both are in GAME's trade in offer where you trade in 2 selected games and get Fifa 13 or Resident Evil 6 for 99p, so £10.99 for Fifa or Resident Evil 6.
Might go look for more Captain America copies or Catherine on the PS3 which is £10 at Blockbuster, will work out at £20.99 for Resident Evil 6 but that's still great.