I think it's dependent upon the type personality you are. I can't remember my Meyers Briggs categories, but I'm definitely a disciplined, detail-oriented person. My husband is my opposite in the Meyers Briggs, so we make a great team. He sees the big picture and I see the details.
Because I love organization and discipline, including self-discipline (my kids say I would make a good drill sergeant
I have to work at being spontaneous and doing things on the spur of the moment. So while you have to work at disciplining yourself to do the things you ought to do, I have to work at busting out of my routine and doing things just because.