How are you a team leader if yes how?

Ask your team mates, see what they think of you.

If you are not comfortable with just asking them, there is this great facebook app that allows you to ask people what they think of you and tell you where they think your strengths lie. I used this app when I was preparing for my new job interview and I must say it was very useful. Try it: https://apps.facebook.com/emplido/