I am one of millions of Americans who has trouble adjusting to the twice yearly time change. Although I travel to other time zones, where I similarly have adjustment problems, I feel I am most affected by the semi-annual change. It usually takes me a week in fall and a week in spring to adjust. Meanwhile, this week I am waking up at 4, sleepy in the afternoon (often taking a nap) and not sleepy at night. In the spring, I am a wreck early in the morning for at least a week.
For the small amount of day light gained in the morning, we disrupt our normal body rhythms.
I always admired those states that had one time all year around. Why can't more states or all states make the same decision?