Finally found out how to organize it in a way I like
1st Default apps
2nd Metro apps that I downloaded
3rd My Computer and folders
4th Most used software
As I used to do since XP, the "all programs" window is organized by categories. Useless shorcuts are hidden, so all the apps are visible, no need to scroll to the right to see them all.
Old and kinda useless dekstop with same color as the Metro one and with no icons. In this way I don't feel the continuous desktop switching, feels the same just with no tiles. And because of the way I organized the rest, I don't need any icon in there.