Is it the “decisive moment”? The composition? Or is it something else?
Take this photograph for example. I like it because of the moment captured. The girl jumping down the stairs with an umbrella and caught in mid-air. I also like how the face of the girl to the left is just barely visible behind the leaves. The composition is alright but it could’ve been a lot better. I would’ve liked to get closer to the scene with a wide-angle lens. This is shot with a 50mm from a few meters away, and I think it feels a bit detached. There was obviously no time to change lens, or get any closer, as the moment was gone in a split second.
So what makes a good photograph? I think it’s several things working together, and I think it’s different for every photograph, every photographer, and every viewer. Please leave a comment, and let me know your thoughts.
Konica T3 with Hexanon 50mm f1.4 and yellow filter. Fomapan 100, developed in Xtol 1+1.

you surely could have added a lot of drama with a wide-angle lense. Or get close and upfront her so that it would seem as if she jumped in your direction.
However, what I like about street photography, is more the scene itself. It is the situation, the people or the street, animals, or whatever you capture. Streetphotography is alive and lives for its spontaneity. So, part of this is its imperfection. A little bit too much light, a light blur in people’s faces, little flaws in the composition … this could be part of it
Thanks for your comment! I definitely agree on how imperfections can enhance a street photograph.