Yeah, it's just generally different than a European football experience. In many ways that's what draws a lot of us to that experience - there's nothing like it here.
Baseball - will never see a rowdy crowd, except perhaps at Fenway in Boston against the Yankees. It's just the nature of the sport
Hockey - in places like Boston, Philly, etc. sometimes, it'll get rowdy. Especially in the playoffs
NFL - the closest thing you'll get to European soccer. But not in every city - An Eagles game fits the bill - Philly fans are notoriously crazy
NBA - tickets are so expensive, it's generally a wine and cheese crowd there to be entertained
In addition to American sports being more about entertainment than lifestyle, the stoppages in play with American sports kills any vibe to make the atmosphere more electric