The Fox network cannot risk pissing off Seth MacFarlane. If they do, they run a good chance of suddenly finding most of their entire Sunday night line-up sucking eggs. At least, that's one possible reason for the renewal of American Dad for a sixth season. That pickup gives MacFarlane the renewal trifecta for Sunday nights.

Actually, of MacFarlane's three series, American Dad is the best one (although I'm finding The Cleveland Show inching closer to first place). As opposed to Family Guy, the storytelling is more linear than the other two and the jokes actually have some relevance to the plot or characters (I'm on Team South Park regarding that "feud").

The Cleveland Show is also better at linear storytelling and jokes than its predecessor, but it's still not up to the standards of American Dad. Sadly, American Dad will likely live in the shadow of Family Guy and The Cleveland Show for years to come. At least MacFarlane has three chances with Fox to keep on working.