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.
This Doctor greatly abhorred violence and often hesitated about taking matters into his own hands. For the first time, indecision weighed seriously on the character, and it had its consequences - yet this Doctor was also one of the most courageous of his incarnations. He was willing to take chances with companions who were originally threats even as he pretended to be unaware of it at first in order to grant his companion the opportunity to do the right thing. He was also willing to make enormous personal sacrifices simply to keep his word and liberate others from suffering. This Doctor takes the emphasis off the eccentricities and turns it into a pained heroism of a man who is so much better than the universe he is trying to save but cannot bear to let it stand.