I've been watching The Simpsons my entire life. I still remember episodes back from when I was little, Like the infmaous one about Frank Grimes, the Sideshow Bobs, Who Shot Mr. Burns, etc. I, personally, think that the Simpsons is still funny in some spots, just not very. I think this movie is there to get the last out of the Simpsons, to be honest. They won't renew it after whatever time they left is up.
Oh, and Family Guy is funny. In the newer episodes they have toned down on the pop culture references quite alot, and they tend to make jokes based on the actual plot and characters rather than some TV show from 20 years ago. Or maybe the references just weren't funny enough for me to notice them.
Oh, and yes, Futurama was a great show. Sucks that that got cancelled as opposed to the Simpsons, but that is coming soon. It was Fox's fault. They pretty much did to the show what they did to Family Guy, moved it around stupidly or put it in spots where sports would be shown until everyone forgot about it. Funnily, AS picked the shows up and actually aired them and conveniant, consistent slots and the shows became huge.