The Fifth Doctor was far more vulnerable, sensitive, and reserved than his previous incarnations and often reacted to situations rather than initiating them. Frequently, he made decisions by flipping a coin. Unlike his more authoritative predecessors, he treated his young companions as parts of a team, and often willingly participated in situations under the leadership of someone else who had the strong command presence that he apparently lacked. However, the Fifth Doctor's boyish appearance, nervous energy, and charm all hid the fact that he was a Time Lord of great age, compassion, and experience. He could decipher the ingredients of a drink by smell alone and rosemary made him sneeze.