I like South park more because they exagerate issues that I wouldn't have noticed if they didn't. It makes me think more than family guy, and the absurdity makes it all the more entertaining!
I like Family Guy more. I like the issues that South Park raises & makes fun of but sometimes they go beyond funny in my opinion & its just kinda sick & awkward to watch, like Britney Spears with half a head lol. I like both shows but would much prefer Family Guy.