i think both of these shows are great, but personally i like the simpsons better, although family guy is a lot better than some of the newer simpsons episodes, which is to be expected after 16seasons, but older simpsons like seasons 1-9 to me just cantg be beat by family guy, even a lot of stuff from up to the 14th season and a few from even 15 or 16, most people think family guy is way better but i have to disagree, i dont think it will ever make me laugh like a lot of simpsons episodes have,i love fg's stupid humor but the simosons wins my vote, im not saying family guy copied the simpsons because it is definetely not a copy but you cant deny that the simpsons has influenced family guy at least a little bit, it rediefined animated comedy
you have to see some of the similarites,ill just stop now though just to avoid getting possibly flamed...