I'm a Habs fan so i've not followed the Bruins/Leafs series as much as others but.....it it even a heated rivalry?
When Boston/Montreal faced off in the playoffs multiple times in the past 10-15 years, there was so much hatred and animosity and simply ego involved...I don't really notice that level of passion in the Leafs/Bruins matchups. Just because the teams have faced each other a lot, and it's gone to 7 games, doesn't necessarily make it a really heated rivalry.
I think either Boston or Leafs need to face the Habs in the playoffs a couple of times...then we'll remind you what a heated rivalry is
I voted Pens/Caps. Part of it is because i have more emotional investment in it - but part of it is also because the stakes are higher. Ovi/Crosby - also 3 years running the cup champs emerged from the winning of that 2nd round matchup, 2 president trophies, etc.