Yeah, I hate to say it but the composition and such in the second batch seems fairly... off.
Shooting people in the street can sometimes be "cheating" because you can basically find someone really interesting, and as long as you compose them well in the shot, you have a win. It's basically what amolitor is referring to, minus the exploitation (assuming you're not shooting a homeless person, that is). That said, I don't think that most of the subjects you showed us were interesting enough in themselves to carry the image... and then your composition of them didn't add anything either, so in the end you're left with a "not that well composed black and white of some random person". Probably not what you're striving for.
Of course, all that said, I once suggested that someone else on this forum was posting snapshots rather than anything that I would consider having any serious credibility as artwork and was ripped to shreds by about ten people for even daring to suggest it, so... *shrug*