Well I don't like the cloud picture, there is not enough spacing in between the navigation items. There is too much space between the content boxes. I don't like the header type thing for the individual boxes (i hope that makes sense) and I can not read the yellow/orange writing on the grey background. Also, I don't like the fact that there is a 1px space between the white outline and the black outline on the picture of that guy.
Overall, too much white and looks too flat and colourless (except the logo).
to much whitespace between content boxes, the clouds dont flow and just look slapped on. that gray doesnt look so good either. overall just sorta boring and flat looking.