I personally believe that George Bush made the world a much more dangerous place. From a British point of view, he's a complete laughing stock and I think has made America very unpopular with the rest of the world. He basically ruined your reputation, like Margaret Thatcher did with the United Kingdom.
To me from the outside looking in, he caused so much trouble for the United States, I think it's best he's gone, and hopefully Obama will be a breath of fresh air for the US and the rest of the world.
At least he can speak a coherent sentence and talk the talk with cogent speeches, unlike dubya who could barely string two words together and was as thick as a plank!