Fabio, Okay, here it is with no mercy: Technically the work is excellent, which is what I'd expect from a pro, though I think some of the shallow depth of field shots where you focused on near objects and let the background fall into bokeh were a mistake. But my main concern is the lack of people in your pictures. Surely Venice isn't this deserted. The few people you caught are way in the background and out of focus. It may be that Italian law makes it impossible to do street photography, but if not, and if Venice were my hometown I'd surely be after a cross-section of the city's life as well as its architecture. Frankly, these pictures are about what I'd expect a technically competent tourist to shoot.
Well, you asked for no mercy.