[BevvyB]

I actually quite like making up new projects which I know come directly after other projects (ie one can't be started until the other is completed)

Currently I put them on hold and activate them once the other project is done. What would be much better is some kind of start-date-dependency

i.e. Start video project when the music project is completed

or even

Start video project when such and such action is completed

That would give you the ability to show / hide projects based on the completion of not just other projects but other actions - which would give great flexibility ESPECIALLY as time and time again project start times overlap - sometimes the pre-production for something starts half way through another project once a specific action or milestone is met or completed.

Some nifty way of adding the start date in the start date box as a dropdown of other projects would be a good start - or something like that! Be nice not to have to use the inspector for this.