What have been the most intense NHL team rivalries in the league's history? From what I remember Edmonton/Calgary was brutal in the 1980's but so was Chicago/Minnesota or Boston/Buffalo. Or maybe the 1990's rivalry between Detroit/Colorado which was considered the greatest rivalry of its time due to the teams facing each other in the Playoffs so often which made it different from typical rivalries which were based on teams playing in the same division. I'm also interested in how these rivalries felt from the inside, from a fan perspective rather than from the view of the players. I think some of the rivalries emphasized by the media have been exaggerated. For example, besides the St. Patrick's Day Massacre of March 1991 I don't actually recall the Blackhawks and Blues being that intense of a rivalry at least not when compared to the rivalries both the Blues and the Blackhawks had against Detroit. What do you think? Most intense NHL team rivalries ever?