Ulf, I use ALL the Window layouts. And I've applied a type of logic to them. Apart from anything else it reminds me what I'm doing with acproject and at what point.
So:-
Alt+D+0 and up to +4 are variations on a theme of auditioning using Media Manager.
Alt+D+5 and +6 is my BIG Timeline stretching through my 32" main monitor.
Alt+D+7 my Audio Layout with the Mixer loud and Proud!
Alt+D+8 my FXing/Colour Correcting and Grading
Alt+D+9 The FINAL stripped-down lean and mean Render Layout.
So, there you have it. Having this approach to layouts makes it a cinch to 3 finger my way through my projects and dip in and out of layouts that give me specific focus to a work space, be it Audio or fx-ing or rendering or needing to see a mass of tracks.
I did have one for Pro Type Titler ..... but for some reason (wink) I don't use that much now.
Here is one that I use mostly, I also have a LCD TV plugged into HDMI for my preview monitor. I have several other setups saved for different kind of editing. one has just the mixer console on the right monitor, another has all tracks on the left and tools on the right.
I really like the fact that you can create different workspaces and save them and then switch between them on the fly, also I have them backed up so I can reinstall them when I have to reload or update my computer.
Have fun setting up and post a pic so we can see what you came up with.