What does the eccentricity attribute (for a goalkeeper) mean, and how is it an advantage/disadvantage?
Did a quick google search because this is a random question that's always bugged me as well.
This is taken out from the Hints & Tips by Marc Vaughan & Nick Habershon for FM07.
An eccentric keeper is a double-edged sword. He might be capable of moments of genius, but equally you may find him scampering out of his box with no hope of getting to the ball before the opposition striker. If you like a player with a bit of character, a low rating, in my opinion, is not necessarily a good thing.
So as you can see it's totally up to you to decide on how you look at signing 'keepers.