US Culture is heavily based in entertainment and technology. As a very well developed nation, the US prides itself in being a major world power, excelling at many things, including sports, entertainment, and the latest in new technology.
Arguably, the most popular of these sports is football, as the Super Bowl prides itself on being the most popular sporting event of the year. Commercial ads run into the millions of dollars just to get a 30 second time spot during this event. Additionally, millions of viewers tune into the weekly college football rivalries and most football fans have an opinion one way or the other about the BCS.
Opponents of football would argue that baseball, however, is and will always be America's pastime. This sport has been around longer than any of the above, and was one of the reasons that the United States became so popular at the turn of the century, as many nations began to follow this sport after a group of American teams toured the world to showcase it's pastime.