Finally I have to admit that I need to adapt with either Unity or Gnome 3. Although Unity is the default UI for Ubuntu 11.10, I don't feel I like it much. After few experiments with XFCE, KDE, Gnome 3 and the default, I decided to use Gnome 3 instead?
For me because I can simply add more workspaces using add drop, also tweaking the UI - not much config avail though using gnome-tweak-tools.
As long as I can do my job, it's fine.