To be honest I'm a Canucks fan and there's no one I hate on the Bruins, not even Marchand, I respect him in a way. He does whatever it takes to win for his team, even crossing the line sometimes. Thought during games, he's a ***hole
I don't hate or strongly dislike many players, even on rival teams, though I do take joy in seeing such players get knocked silly, have slumps, get bested by my team, etc.
But for rival players that I do have somewhat of a liking for, as a Pens fan I'd say Hartnell, Pronger (I've loved to "hate" that guy forever though), and if you count the Wings as a rival Datsyuk and a few other Wings since I'm local to Detroit. As a Bruins fan, the only Canadien I can bring myself to like at all is Hal Gill and that's only because he's played for my black & gold teams.