Hi Michal, first off you have a beautiful family. I like them both a lot. #1 especially is so cool. The blank stare from the youngest while the older child is crawling over your wife is such a great contrast. Those flowers go great with your wife's blonde hair.
The empty space looks great to me. This style of portrait photography is counter intuitive compared to how we compose with landscape photography.
There is an issue with Uploading Photos (attachjments). I am not sure what the problem is, and I am looking into it. You can still try to Create your Threads and Upload your Photos, but it is hanging up during the Upload.