I went to the World Cup qualifier in September 2005 at Crew Stadium where the United States clinched their ticket to the World Cup with a 2-0 victory over Mexico. Columbus is one of the few spots in America--heck maybe the only spot with a soccer specific stadium--where the United States can play Mexico and have a majority of fans in the stadium rooting for the red, white, and blue.
Here's an incredible short video I found shot by someone in the stands with the crowd's reaction to the USA's second goal scored by DaMarcus Beasley: http://www.youtube.com/watch?v=_cdYw6m2Y_s
The Final Whistle of US v. Mexico - http://www.youtube.com/watch?v=eMeJyueCWnk
I'd like to see a Final Four whenever UK gets back there. Now that Billy G. is on board, there's finally some hope it'll happen sooner rather than later.
Champions League final.
FA Cup final.
Some day I'd like to spend 2-3 weeks in England going to a bunch of different Premiership as well as first, second, and third division matches to experience the entire spectrum of professional soccer in England.