I use QCAD mostly for mapping. I love many of the program's features, but as has already been suggested, it would be much handier if it were possible to configure North as Zero, East as 90, South as 180, and West as 270.
It would be handier yet, at least for me, if it were possible to enter a compass coordinate such as N893000E, and have QCAD interpret it correctly as 1/2 degree less than due East, or S450000W as being exactly halfway between South and West.
If anyone is interested, I built a simple spreadsheet I use to translate such coordinates into the angles understood by QCAD. Manual translation of any kind is time consuming, but my spreadsheet makes the process much quicker than otherwise.