The Simpsons is pretty hit or miss these days. The current crop of writers seem to have this obsession with nonsensical loony-toons style sequences that just don't work for me. Still though, they turn out a good one every so often.
Honestly, I don't think Matt Groening gives a

about the simpsons anymore. Futurama was where his heart was but as usual, Fox in their infinite flakiness, cancelled it. When I think about Futurama, Family Guy (before it came back), Profit, Firefly, Kindred the Embraced, Space Above and Beyond (ok, space and kindred sucked, but in an entertaining way!) and the Ben Stiller show, I get the urge to find the various heads of programming at Fox and kick them squa'w in the nutz