I hate the old firm.
I hate seing our rivals (Falkirk and to a much lesser extent, Raith) do well. I can respect Falkirk fans, if they'd been born twenty miles east they might have been Pars fans, they are just guys following a fellow middling Scottish football club because it's where they're from or it's who they're Dad supported, I'll have far more in common with a Falkirk fan than an Old Firm fan, however...
When Dunfermline played Celtic in the three national Cup finals between 04-07 who did you support? Maybe I'm just petty, but despite me despising everything about Rangers I was still happier when they beat you in one.
The drama I've got is that if Falkirk, or Raith for example win a national title they'd quite rightly use it as a "Get it up ye" point against Dunfermline, you beat them in a derby game the retort can be "Aye, but I've seen my team win the Scottish cup" that's game set and match eh?
Whereas if the old firm beat Falkirk in a final it's just another day for them.
Again, it might just be me being petty, but it's how I see it.
Edit - I've just seen I've used the word hate a few times there, that's more than just a bit excessive.