I think Obama is going to be a lot to help relieve anti-American sentiments, but it will take much time for the wounds of the Iraq War to heal.
Now I'm a Brit, but am something of an American at heart. I wouldn't necessarily like to live there, and I don't agree with a lot of the things that the government does and things that people believe in, but in terms of culture and entertainment, the US o' A is beyond comparison.
Firstly, there's the fact that my three favourite video games - Oblivion, Half-Life 2 and BioShock - were made by American developers, not to mention that my favourite console, the 360, is American. Then there's the fact that like 90% of the music on my iTunes is from American bands. Sure, Britain has Radiohead and Pink Floyd, and Japan has Envy and Mono, but so many of my favourite bands (Thrice, At the Drive-In, Sparta, The Mars Volta, Circa Survive etc.) are American. Thirdly, there's sport. Now I love a good game of footy, but to me no sport compares to american football. It's the highlight of my autumn/winter to be able to watch the NFL every Sunday, Monday and Tuesday (have to record the late games to watch next day). Shame my Colts got knocked out so early, but 2009 is going to be fascinating for us.
Also worth mentioning that the best holiday of my life was to the USA. Went to Chicago, Indianapolis (saw a Colts game - AMAZING!), Canton, Ohio (NFL HoF, also amazing), Connecticut and NYC. Incredible holiday.