AGE: 47
OCCUPATION: President of the United States
PREVIOUS APPEARANCES ON THE TIME 100: 3
PRO: He overcame the Clinton machine, the McCain brigade and America's racial history to win nearly 53% of the vote and a shot at what's beginning to seem like the least enviable job in the world.
CON: For a guy whose campaign was renowned for order, Obama's Cabinet appointments have been a tad messy. But let's face it: he's the most powerful man in the world.