Simpsons pretty much stopped being "good" to me about 4-5 years ago. Sure, there'll be an occasionally good joke or two, but it's worse than Family Guy when it comes to finding a "gem" each season. Futurama, despite having a bit of a rocky resurrection, since it wasn't until "The Late Philip J. Fry" that that really returned to full glory, has managed to stay in the zone that Simpsons was once in. Being a balance between great humor and drama, with neither being too overpowering (never too sad that it depresses you/never too silly you can't help but say "this is stupid").