I would like to know what's your favorite rivalry that you watched? But you can't pick a rivalry that involves your favorite team. Mine has to be the rivalry between Detroit and Colorado had in the late 1990's and early 2000's. The passion that both team showed on the ice gave me goosebumps. The hatred they had for each other was almost impossible. They wanted to kill each other just to win the game. I couldn't get enough of that rivalry and I haven't really seen one like that one in quite the while.