I rarely ever take pics of homeless/beggars/needy. I'm with you on that front. I mean, I have done, when you're out in a city it's hard not to, but I've always, Always! given them something - and very rarely ever even used the end shot. It just isn't me.
Looking at my own shots I guess I like a bit of dark humour, maybe.
The guy with the brolly was motoring along, nayr a bother - and there's the guy incoming with a T-shirt on! that was Manchester, sure ye'r all mental over there

- The 2 guys chatting on the steps were aware I was shooting right at them, didn't phase them, they were beggars, and I went over and gave them a few euro right after - The wee guy that looks lost in the crowd was singing his heart out - I don't think I captured that well. Often it is your own memory of the scene that makes it feel more than it probably is in the end. I get that. The guy with the mini sword, well, he was a random punter pulled out from the crowd by a street performer, again, not obvious, but made a good photo I thought. The last one, well, as someone posted under it on flickr said Canon guy gets the girls again

which I thought funny, though my "get a room"title said enough.
It's about capturing moments, that happen, on the street ... timeless they should be, which is why I prefer B&W for such images.