Thought I'd post the descriptions. I suspect it is my dislike of large crowds, adherence to rules, and light alcohol consumption that made these selections appear.
Barack Obama was born to a middle-class mother in Hawaii, but grew up without knowing his father. He moved a couple of times as a child. He is known as having introspective traits and has written multiple books on his own life and the American political system. Socially he is adept but not extremely outgoing. He is also very deliberate and slow to express anger or discomfort, and known for trying to seek consensus in his interactions. In fact, one criticism has been that he is overly trusting of others' intentions. Compared to his previous Democratic predecessor, Obama seems to have avoided personal or ethical lapses in his judgment.
Similar:
Jimmy Carter was born to a Georgia family of modest means. He was very intelligent, conscientious, and reserved. He largely avoided scandal, but sometimes stuck to narrow ethical principles at the expense of the larger picture. He also, after the initial luster of being "not Richard Nixon" wore off, struggled mightily to build rapport and affection among his underlings and the American public alike. On the world stage he was pummeled for the hostage issue in Iran and was accused of naivete in several areas. Carter drank rarely, if ever, while he was President.
Dwight Eisenhower spent most of his childhood in Kansas, living in comfortable but modest circumstances. Having spent most of his life in the military, he was regimented, organized, and hard-working. He possessed great capacity for strategic thought when it came to matters of the military and world politics. He was fairly outgoing and got along with most people. Yet he wasn't blind to the faults of others. He was well-adjusted mentally, to the point that some people found him boring. Independent of his time as President, his leadership in World War II makes him one of the great heroes of the United States and western Europe.
Least Similar:
Andrew Jackson was born into a dirt-poor family on the fringe of North Carolina. Throughout his life he had a gritty, worldly personality and a famously irascible temper. He cared little for getting along with most people and was involved in multiple duels as a young man. He was fairly outgoing and could hold his own at social gatherings. He promoted personal favorites to high positions in government and ignored his Cabinet in favor of advice from friends. Yet he was ever-suspicious of America's "elites", and was paranoid when it came to his political enemies. He ignored rules and regulations entirely when it served his purposes.