No offense, but I don't like either one. I personally find The Family Guy, South Park (and similar shows- American Dad, The Cleveland Show, Bob's Burgers, The Simpsons, etc.)- basically the entire "Adult Swim" programming line up- to clash very much with my values and I don't watch them.
Now I must also admit I have seen some of all of the shows I've named at least in passing. (i.e. channel flipping)- and I have watched full episodes of some. And the sad thing to me is- these shows can be very funny and can even make some valid points- but they are also crude and vulgar many times (i.e. with displays of gross violence, sexual immorality and foul language- not to mention that a number of these shows are sacreligious at times and have had blasphemous depictions of Jesus Christ, Whom I hold and call as my Savior and Lord- so that in particular is grievous to me. However, for the record, I have also seen other religions mocked on The Family Guy- Hinduism and Islam in particular come to mind.) For the parts that are genuinely funny and not vulgar, I do enjoy those bits (namely The Family Guy's and The Simpsons' funny references to older TV shows and movies, etc.)- but not everything else.
So anyway- that's my personal view of such shows. When I think cartoons, I'm thinking cartoons that are generally aimed at children and that can be enjoyed by the whole family. I'll pass on these adult-aimed animation shows. (Some of which can arguably be called animated sitcoms really- just as The Flintstones and The Jetsons could be called that too- and I love The Flintstones and The Jetsons- I'd gladly take those over most any TV programming today. 
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I don't mean to disparage anyone who does enjoy the Adult Swim type cartoons- you are welcome to enjoy whatever you want to watch. For me personally, I have some issues with these shows and that's why I don't watch them- so I'll just have to differ with people on this one. But it's cool- no offense meant to the fans. As Weird Al said in "Couch Potato"- "You can watch whatever you want, man." 
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