I agree with you, but if you skip the "My folders" sub-folder, then I would actually put the unsorted bookmarks first, so if the user has unsorted bookmarks, the users own folders should be less accessible. Why? Because unsorted bookmarks are, at least for me, bookmarks that haven't been sorted yet. They should only be there a short time so the user later either can finish the "task" and delete the bookmark, or save it in another folder. They should be first so every time the user opens the menu, the user should go trough them and hopefully do something with them.