This is a question for anyone, regardless of age, as we all develop differently but, on average, it is believed that the older you are, the more patient you become, with the stereotypical thought being that the younger you are, the more impatient.
With me, it's been the ape-osite; I've become more impulsive the older I get.
When I was younger, I was a very patient boy who made decisions based on calculated risks. Ever since I left the Army, that patience started to wear thin.