What is the most important thing to success at call center career ?

PATIENCE-PERSEVERANCE-PERFORMANCE= CALL CENTER ENVIRONMENT IS VERY TOXIC AND SCHEDULES ARE ERATIC IT CHANGES EVERY NOW AND THEN THAT WILL TEST YOUR PERSEVERANCE TO GO TO WORK EVERYDAY. YOU WILL DEAL WITH DIFFERENT PEOPLE OF DIFFERENT BACKGROUNDS SO YOU NEED PATIENCE AND WITH PERSEVERANCE AND PATIENCE COMES YOUR PERFORMANCE. BECAUSE IF YOU HAVE PATIENCE AND YOU PERSEVERE THEN YOU WILL PERFORM WELL.

We must self confidence, Motivation, Energenic friendly speaker with good diction and patient as well.

You should be customer centric  and should have great business acumen and domain expertise.