"But the others are of importance also, keeping practices competitive, keeping the locker room on the positive side.
"So obviously a coach needs to look at the intangibles of those players, and how they will deal with that role.
"A coach has to look at the personality of players as well, not only their talent."
Arena has been accused in some quarters of favouring players who played with him at club level, but Gansler feels there will not be much disagreement on his starting line-up.
Gansler said: "Bruce has a history with some players in terms of them having played for him, or having played against him, so he's been able to observe them more than others.
"That's where there could be a disagreement.