Qualities of Team Leader

Hi All,
Being a team leader (TL) is really a tough job. You need many qualities to be a successful TL. According to my perception, some of them are :
1. Good tolerance power.
2. Sound and thorough knowledge in his/her domain.
3. He/ she must be practical not emotional.
4. If the team is doing good work and succeeding, its his/her responsibility to encourage their team mates.
5. If a team fail to do any job, TL should hold the moral of team, try to find the fault and prepare the team for future to deal that situation.
6. TL must create a healthy interface between management and team members.
7. He/she should be loyal and sincere for the company.