I used to love American Football. I watched the games on Channel 4, and went to the American Bowls at Wembley Stadium.
Then I followed the London Monarchs - seeing all their home games and also seeing them abroad. It was far better than the NFL because even though most players were Americans, it was a "home" team to cheer for and had Brits on the team. Then the league scrapped them in 1998 and my interest has waned.
I still think it's a great game, but just don't have the motivation to watch it any more.
Maybe I'll try and catch a game or two and see if I get the bug again...