Thanks for all the comments!
Let me get into a few remarks.
If you think the first shot was taken from too far off, maybe you'll like this one better (I don't!):
I had the camera to my eye, kept one of the girls in the middle and snapped as the other one looked back at me.
...or just from a different perspective; was hoping they would try and júmp over the water but they did not
🙂. (somehow this is kind of a dull picture I think, I am not really a fan)
The first street shot I really like, in fact. The shadows, the perspective on the right, the grandma's head popping up... I consider it a lucky shot --didn't have time to bring the camera up to my eye and properly compose --and the result pleases me in a way. Of course: it's okay for you not to like it! ;-) It's good to disagree; makes our (look on) photography much less objective and sterile than it sometimes seems to be in gear discussions. I like that.
About the second street shot: I tought it was not completely worthless because of the "copied" poses (all looking down) and different plane of focus (which adds some depth) between the characters. The "lingerie" advertisement was a welcome subtle funny note. But again, I don't want to sell my pictures here and I believe we should be critical about our own work. If you don't feel it, you just don't feel it.
I will definitely take Andrew's advice to keep practicing.
Andrew Sowerby said:
The two "street" photos don't do anything for me, but I think that it takes a while to develop the ability to shoot street. I'm certainly not very good at it. If it's something that you're interested in, keep practicing.
I like the first one and I disagree with the poster above who said that you should have been closer. I like the framing. The last one is the best of the bunch, IMO. Good DoF and tonality.
About the baby shot: it was taken in an elevator, which means 4 people plus a baby on one square meter and very low light (taken at 1/15, f 2.0, 1600 ASA + green-yellow filter). Each time we took the elevator I had the time to snap just one shot. Here is another one:
And for those who thought it was too dark, this version is a tad lightened up. Here you can see the girl who holds him is about to give him a kiss right when I took the picture.
Again, thank you all for the helpful reactions.