Attributes are mentioned in order of importance.
Goalkeepers
1. The most important attribute for a keeper is REFLEXES.
2. Perhaps surprisingly, COMMUNICATION is also very important. If it’s low then you should stayaway from that player. It is strongly linked with Adaptability – one of the hidden player attributes. If the player that you want to sign doesn’t speak the language of your club’s country and your scout tells you he finds it hard to adapt to life in another country then dont purchase.
3.AERIAL ABILITY, AGILITY, ANTICIPATION, COMPOSURE, CONCENTRATION, DECISIONS, JUMPING REACH and POSITIONING.
Central Defenders
1.HEADING, MARKING and TACKLING aren’t as important as most people think. Remember that marking relates to the skill a player has to follow somebody.
2. ANTICIPATION, POSITIONING and WORK RATE are by far the most important attributes imho.
3. ACCELERATION is also v important. As indicated elsewhere in this thread I also like pace relative to position (at least 12 but better 13-16).
4.JUMPING REACH, COMPOSURE, BRAVERY and DETERMINATION.
Full Backs/Wing backs
Note: I have noticed that, tactically, full backs/wing backs are perhaps the most important players in a successful tactic plus (or maybe, consequently) they are among the first players to tire.
1. ACCELERATION, PACE, STAMINA, WORK RATE and TEAMWORK.
2. ANTICIPATION, CONCENTRATION.
3. CROSSINGand TACKLING.
4.MARKING.
Defensive Midfielders
1. ANTICIPATION, COMPOSURE, CONCENTRATION, DECISIONS, DETERMINATION, STAMINA and WORK RATE.
2.PASSINGand TACKLING.
3. Decent FLAIR, ACCELERATION and PACE (relative to position).