Roy Keane has claimed that he takes 'very little satisfaction' from his new career as a manager.
He told The Observer: "It's obviously a madness. You do it for the challenge. It's in you. It's a buzz. When I stopped playing I thought I could relax.
"But then I got this challenge from Sunderland. And I enjoy the challenge, even if I get very little satisfaction from it. Maybe a five-minute taste when we win a game.
"That's why managers are old before they know it. What I love is being in a team with coaching, medical and scouting staff."
He has been forced to bring his famed temper in check on the touchline, partly for the good of his own health.
He said: "As a player you could physically go up against people. As a manager it is not really allowed.
"I've made a conscious effort. When the players cross that line you can't tackle, you can't pass, you can't score.
"The major part of it was to try and keep a calm head. If you do lose it, do it in the dressing room, otherwise you'll go to an early grave.
"Martin O'Neill leaps around and at the end says he physically feels like he's played a match. That's his style. Everyone's different but I can guarantee we all love winning as much as anyone else."
And Keane is now keen to show a respect for his managerial opponents as he learns his trade in the dug-out.
He added: "You see different people in different lights. As a player I didn't care where I was going, I just wanted to beat them and showed little or no respect for any player.
"I'm definitely more respectful to other managers. Rafael Benitez couldn't be more helpful. Arsene Wenger has been brilliant."