there are a few things that I used to do regularly with the "Ubuntu Classic" interface and I can't figure out how to do them with the Unity interface (provided it is possible to do them at all):
open a file at a specific location: I used to type Alt+F2 then type the complete path to the file (with tab completion) and then hitting Enter would just open the file. It seems to me that there is no way to do the same thing in Unity. Searching for the filename is not really an option as there may be multiple files with the same name in different locations.
single click window selection: thanks to the windows list applet in the panel, I could switch from one window to the other (within a workspace) with a single click. Can I do this in Unity? it seems to me that this is not possible.
single click workspace switch: thanks to the workspace applet in the panel I could switch to a different workspace with a single click or move a window to another workspace very easily by dragging it in the workspace applet. In Unity I have to move the cursor on the left border, wait that the lancher pops up, click on the workspace switcher, wait that the workspaces pop up and the I have to double-click on the ws I want. This is waaaay to slow. Any other option?