Popularity and team animosity fluctuate heavily based on historical rivalries, playoff battles, and physical styles of play, but franchises like the Boston Bruins and the Toronto Maple Leafs frequently attract the highest concentration of opposition from rival fan bases. The Bruins have historically embraced an abrasive, physical identity that draws the ire of opposing supporters, while the massive national media spotlight and intense passionate following surrounding the Maple Leafs often elicit strong counter-reactions from fans across both Canadian and American markets.