Family guy!!
Simpsons are good, but getting a bit old now, and I'm sick of those musical episodes...
The jokes in family guy are much funnier and targeted at an older audience
as said above, the musical simpsons episodes suck. also, every new simpsons episode seems the same.
then again, the end of family guy season 4 wasnt all that great (the PROPER season 4, not that crap release on dvd a few months ago). still, ill go with family guy