King of the Hill I love. I like how it seems like real life, but cartoonized. You dont have someone getting a nail gun shoot nails through your ears or a talking dog or anything. Not that Im dissing Simpsons or Family Guy, but a cartoon that doesnt involve those kinds of things and can still deliver funny moments I love. The show revolves so much around real things that can/do happen and it's just great. Hank I love, especially the sound he makes when he is shocked upon seeing something. Dale I love because he's just a scrawny dumbass and has plenty of funny moments. Cotton is good because it's like he likes everyone BUT his son. Boomhauer with the way he talks. I still try to see if I can understand what he says. Overall the show is great.
Futurama I love. It sucks it was taken off the air, but I dont think there is one episode that I would look at and go "eh. Dont feel like this one tonight". The one where Bender becomes God is genius, as was mentioned. Loved him giving life and killing it all in that 20 minutes. There were many other good episodes, like the one with Fry's brother, Fry's dog, the ones with the 'What if' machine, upon others.
Simpsons I went through a phase where I was like "I dont like this show", after having watched it constantly. I was young though. Overall the show is good but there are some episodes where if I've seen it a few times already and/or dont feel like watching that episode, Ill flip to something else.
Family Guy was great at the beginning, but yes now it really is nothing but pop culture referances and gags that run on too long. It's like the flashbacks/cut scenes are the bulk of episodes and there's no real plot anymore.
Overall I wouldnt go on a show and say "Simpsons are better than Family Guy and here is why." There is no fact that states it as so. It's all opinion. I'd try to find someone who likes both shows so that they could go over the pros and cons of both shows over the years of their running. That way it isnt just "Simpsons rules! Family Guy sucks!" or vice versa.