There are some tremendous images there, and (photographic) lessons to take to heart.
1. Capa was right - get closer
2. Composition, focus and exposure are guides not rules
3. People are the most impactful, compelling, ever changing, subject imaginable
4. A compelling image begins with a strong vision
I say this not to trivialise but to recognise talent when I see it. I tip my hat to Yannis; he cannot fail to have been touched by what he has witnessed through his viewfinder.