I'm sure there's different styles of street photography, but to me it's all about the connection with the people being photographed. When I look at your linked photos I don't see a whole lot of emotional connection with the people. You seem to be still an observer. It's almost like you're still not comfortable getting in close, which I'd assume will get easier in time.
One clearly stands out.
When I think of street photography, I always go back to  pawdrix. Even if the person being photographed isn't looking at the camera, I still see a connection between the subject and the photographer. I don't know how long he spends studying these people, but their personalities are captured, and they're more than just people walking down the street.
On a processing note, your photos are too dark to me. The people are almost completely sucked into the blackness.
Example
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