What it takes it to be a Good Leader?

In the last 20 years, i have had the opportunity to come across different people, each one has helped me in a way or other. I have been able to learn some of the best qualities, this does not mean that i have been able to totally follow every one's best quality, i am just mentioning over here that i have been able to appreciate their qualities. In some cases, i have been able to follow theirs...More over whats good/best quality for one necessarily need not be the best for other person...i have a valid reason to say that...while some qualities are universally applicable, while some needs to be applied based on the situation. I think i am drifting from what i wanted to write......coming back again, from these people i have observed a few wonderful points which i thought i would share with you all.This may be helpful atleast for a few people who are aspiring to become leaders.
Have you ever thought what skills are required to be an effective leader for a team?
My observations has always been that the most important quality these people possess is the ability to communicate effectively. Excellent Communication skills has naturally helped these leaders to communicate of what result they expect. Lack of communication or improper communication on the other hand has proven to be disastrous...Still to continue.....