It is not good if a person's behavior is predictable.
It is not good if a person's behaviour is unpredictable; where do we draw the line?
Predictable behavior could indicate a rigid personality which could indicate a personality disorder which means the person is not able to benefit from new experiences.
Given a person who is unpredictable I guess it could mean they are flighty or impulsive or adapting continuously to new information. I guess time will tell.
As to where to draw the line, see
http://en.wikipedia.org/wiki/Ship_of_Theseus[/QUOTE]
Well I would like to thank you very much for this informative post, howsoever! I did find it a bit hard going and not really in keeping with modern times, so please have a gander at the utube clip which is much more relevant..
http://youtu.be/s1VNNbSYdt0