Just not fond of them. I'm a right haggler for teams getting undue luck, so them seemingly consistently scraping undeserved 1-0 wins gets right on me tits, the fact Darren Bent single handedly carries them, etc. You're my second team anyway so I see no reason not to support you come Sunday.
Edit: I also see a lot of the rivalry, in the Everton-Liverpool rivalry. Maybe not quite so much now but when we were shit, and my word we were shit in the 1990s, there was far, far too much talk of what Liverpool were doing (well, from when I can properly remember, i.e. late 1990s onwards). Only in the past few years has it finally got away from talking about our neighbours. It's something Sunderland ought to do - it's pitiful how much they talk about you, and the Sunderland fans I know exemplify this trait.