So, you're sharing these in the hopes of getting some constructive criticism I think? Here are my thoughts.
There is a lot of street photography out there now...a lot. You need to make pictures that have something really interesting occurring on more than one level, i.e. it's not just good enough to be an interesting scene to you but there has to beautiful light, a strong composition (often a sense of geometry), and there has to be something sort of strange and curious about the photo (it needs to inspire questions in the viewer rather than provide simple descriptions).
The challenge for street photography is learning how to get close. Photos of peoples backs and from a distance can work, but they will usually not engage your viewer like photos of people close and facing you. It's not easy. There is a lot of discussion about it on the net. The best street photographers have found their own ways to do it.
Unless you are posting a single photo photo for critic, to understand why it works or doesn't, then only show your best photos. And by that I mean really the best of the best, if there is any lingering question about it in you mind then don't put it in your portfolio. What I'm talking about here is acquiring the skill of editing. Show people a few bad photos and they will walk away.
I suggest looking at good photos and trying to figure out what you like about them and how the photographer arrived there. There are great groups online for this, hardcore street photography on Flickr, inpublic, Magnum Photos, VII, and more good flickr groups
here.
That said, I wish you good luck and good light! and to keep having fun with you camera.
cheers,
Ian
