Today I was looking at photographs taken by one of my friends. He is better informed, better equipped photographer than beginners. So, his photos portray better composition, better angle and better light. His favorite space is 'street photography'. Since other friends also had a look at the photos, they were discussing about it.
Most of the comments were 'he takes pictures of unknown people', 'off-focuses on main objects' and things like that. I started explaining what is street photography to them in my own words.

I began my photography once I got my basic Kodak camera. This camera I had bought for small outing purposes. The time was end of film-based cameras, however my first camera was film based. There we have disadvantages of knowing nothing about the capture till you get it developed.
Till recently my interest in photography was handicapped, as I was not in a mood to choose my first digital camera. Last year, I got one, and then I started in different areas of photography. I too like to capture life moments and street concept. I am doing better in portraits than before. Nature photography is promising. Haven't tried much on capturing motion.
I feel street photography can give you varied subjects. It is a really colorful one and most dynamic one. If you have a keen eye, you can capture hundreds of shots over a simple street. I am not telling every of those shots will be great. Definitely every of them have potential to be a great shot.
Main hurdle in street photography is hesitation. It is in the photographer. Anyone who is interested in street photography has to move freely in crowded road, in unfriendly environment. He has to have no hesitation for directing camera towards any random person, thing or event. Not many gadgets he can carry. He wouldn't get all time to focus and plan his shots. Its a quick and spontaneous photography. A minutes delay will result in a lost scene!
I had a though of capturing some street moments, and that time, I didn't have my camera with me. One day, I went out with camera, thinking that I will capture some street moments. When time came to take out my camera and click, I hesitated. For that mistake, I still repent. Not only for the lost scenes, but for the opportunities to overcome the hesitation. I hope, I will learn the techniques of street photography and overcome the road-blocks!