The United States of America has had its share of heads of state and government throughout its history. Some of them have been considered "good," some "bad," while others have people undecided. For this list, we considered presidential accomplishments that had a lasting, positive impact, as well as the leaders’ ability to inspire. We excluded presidents after George W. Bush because we felt there’s been insufficient time to evaluate their long-term effectiveness. Join WatchMojo.com as we count down our picks for the top 10 U.S. Presidents.