It would seem
To be of greater value to be in a fighting stance when addressing a target, especiallya living one. Strong side, slightly bladed, to rear, also you are prepared to move either direction at that point. Therefore your turn would be less than a full 180, but I guess we all do what works best for us as individuals. To be arbritary, in turning direction, isn't realistic or reasonable. Myself, I turn gun side away from adversary, weak side slightly forward, and use a modified Weaver. This allows you to ward off any close at hand threat, and have handgun in a better protected position. Also the first step in any direction is already made. But, heh, I use cover garment, IWB, carry piece for USPSA. To each, his own.