" In Character Strengths and Virtues, Peterson and Seligman contended that “there is no true disadvantage of having too much self-control”; it is a capacity, like strength or beauty or intelligence, with no inherent downside—the more you have, the better. But an opposing school of thought, led by the late Jack Block, a psychological researcher at the University of California at Berkeley, argued that too much self-control could be just as big a problem as too little. Overcontrolled people are “excessively constrained,” Block and two colleagues wrote in one paper. They “have difficulty making decisions [and] may unnecessarily delay gratification or deny themselves pleasure.” According to these researchers, conscientious people are classic squares: they’re compulsive, anxious, and repressed. "
― Paul Tough , How Children Succeed: Grit, Curiosity, and the Hidden Power of Character