Great game. Why?
1) Free Club transfers enable you to put the best players in a team, making it possible for an all star team. I.E. Putting Eto'o in Nottingham Forest.
2) Manager Mode gives players both the feeling of manager and player at the same time.
3) Challenges make the player go wild for points.
4) Songs featuring the likes of Jamiroquai and Oasis.
5) A very distinct Edit Mode and Create Mode.
At the start of the game, you MUST face Classic XI, which is a challenge for players who want to get the feel of the game. Midway through the game, you will get this.
I think FIFA 06 is the greatest soccer game next to Winning Eleven.