There are some singers that know exactly when to go, and others hang on much too long and that is the same, that is the same with judges.
One aspect of appellate judging is we have to give reasons for all of our decisions. And when you sit down and try to write it out, sometimes you find that your first judgment wasn't the right one.
In most civil law systems there are no dissents. There is a single opinion for the court: it is unanimous; it is highly stylized; you can't tell which judge wrote it.