[calumma]

I should also add that I have several organisations that I do paid/unpaid work for and each of these is defined by a separate folder in projects view. Specific projects relating to each organisation are then added to relevant folders. Folders can be added or removed over time and it's a bit of a faff to recreate perspectives by saving a specific view, it would be easier to select newly created folders using check boxes in the perspectives dialogue.

I realise that I could have a more limited number of folders that then remain consistent, but the way omnifocus deals with folder hierarchy is limited, particularly when used in conjunction with the iPad app.