People can take swings at Seth, but the fact is, he does come up with outrageous and hilarious gags and plots, despite how much Family Guy has been lacking lately. He can't take credit for all the humor, he does have other writers, but then again, we can't say he's the one insisting on using a dozen pop culture references an episode either.
We can't forget he's been working on four projects, that will burn any person out. American Dad always makes me smile. Who knows, maybe the Cleveland Show will surpass everything Seth has completed thus far. And no matter what crap he may put out, we can never forget how many classic episodes of FG he's made. Episodes so funny that they did the unthinkable, the show was brought back after two years of being cancelled.
And for those who say he's a hack and think for a second that they could write something close to Seth's quality of comedy, I dare you. The 'make your own FG cutaways' thread from months back pretty much proves there's no one on this forum that could write for one of Seth's shows.
I mean seriously, the first five seasons of Family Guy showed me whole new levels of jokes that I never would have thought possible before. That's why he's labeled as 'smart', FG just comes at you from all angles.