Among The Nine, [Stephen] Breyer is on the cool end of the emotional spectrum, logical to a fault with little if any of the passion that one sees in Ginsburg or Sotomayor on the left, Scalia or Alito on the right, or even Kennedy in the middle….
[H]is ideas have had nothing like the impact of those from his hot-tempered colleague Scalia. After two decades on the bench, the influence of the cold-fish justice is sometimes hard to discern.
— Professor Kenneth Jost of Georgetown Law, commenting on Justice Breyer’s legacy and temperament on the Supreme Court. In Clinton White House papers released earlier this year, Breyer was referred to as “a rather cold fish” when he was evaluated as a possible Supreme Court nominee in the early ’90s.