Family Guy hands down - I did like the Simpson's a great deal back in the day, but when Family Guy came out it was so fresh and off the wall that I haven't been able to watch a Simpsons episode the same ever since. The humor just seems to have gotten stale and uninteresting. Yes, FG has a lot of slapstick and fart jokes, but the true genius of the show is in the tiny details that flood every episode, and the references to pop culture on a level that even South Park can't touch, IMHO. Seth McFarlane is today, the genius that Matt Groening brought to our senses when he introduced the Simpsons.