Hi Marius,
Getting the subject right in a photograph is reasonably straightforward for most photographers; what people often forget about though, is the background.
In this portrait you have captured this man with a great expression but the background is rather distracting. Further, it doesn't tell us anything about where the photograph was taken.
I think you will find this photograph looks better if you can clone out the grey line to the right of the subject and then select the marble wall and use a blur effect to make this look out of focus.
In situations like this a fast prime lens would have been a better option. Something like a Canon 50 mm f1.8 or even an f1.4 lens. In looking at the EXIF data I can tell that you made this photograph at f/5 @ 1/25s and 3200 ISO. With a 50mm 1.4 lens you could make the same photo at 800 ISO and 1/80s.
Aside from getting less grain and less chance of camera shake you would also have the advantage of getting that background out of focus in camera. Perhaps next time!
Cheers, Anthony
Image Doctor's edited version
