I had this exact same argument with my mate the other day. I have no problem with PC, however I am a Mac - and that (or vice versa) should really be the bottom line - because I grew up with it and I am used to it.
QED.
If anyone was wondering, this was the argument after ten minutes:
Me: I have no problem with PC, however I have a Mac
Mate: PC's are better.
Me: Well, why?
Mate: They just are.
Me: Why? I'm trying to form a constructive argument here and you're just saying 'They just are.'
Mate: A PC is better.
Like talking to bloody Cleverbot.