Lately for me, it's American Dad. I used to prefer Family Guy, but recently Family Guy is getting a bit too gorey and unnecessary, and it feels as if they're running out of material. They're just producing more and more stupid, time wasting moments for the sake of passing the time. American Dad has developed a bit more story to it, the characters are getting more personality, and the jokes are getting more hilarious. But it's just my personal opinion. x3